Mongolian pork tenderloin is a quick, American-Chinese takeout-inspired stir-fry of tender pork strips coated in a glossy soy, brown sugar, garlic, and ginger sauce. It is not a traditional dish from Mongolia, and restaurant-style versions vary; this home version keeps the sauce balanced and the pork tender with a fast sear.
Ingredients
- 1¼ lb pork tenderloin (570 g), trimmed
- 2 tbsp cornstarch (16 g), for coating the pork
- ⅓ cup low-sodium soy sauce (80 ml)
- ¼ cup water (60 ml), plus 1 tbsp (15 ml) if needed for a slurry
- ¼ cup packed light brown sugar (55 g)
- 1 tbsp rice vinegar (15 ml)
- 1 tbsp neutral oil (15 ml), such as canola or avocado oil
- 3 garlic cloves (about 9 g), finely minced
- 1 tbsp finely grated fresh ginger (about 6 g)
- 1 tsp toasted sesame oil (5 ml)
- ¼ tsp freshly ground black pepper (about 0.5 g)
- 1 tsp cornstarch (3 g), optional, to thicken the sauce
- 4 green onions (about 60 g), thinly sliced
- 1 tbsp sesame seeds (about 9 g), optional, for serving
- ½ tsp red pepper flakes (about 1 g), optional, for heat
Instructions
- Slice the pork. Pat the tenderloin dry and remove any silvery membrane with a small sharp knife. Cut the meat across the grain into strips about ½ inch (1.3 cm) thick and 2 inches (5 cm) long. Keeping the pieces similar in size helps them cook at roughly the same rate. Set the pork on a clean plate while you prepare the sauce; do not reuse the plate for cooked meat.
- Mix the sauce and prepare the aromatics. In a small bowl, whisk together the soy sauce, ¼ cup water, brown sugar, and rice vinegar until the sugar is mostly dissolved. Mince the garlic, grate the ginger, and slice the green onions, keeping the white and green parts separate. The white onion pieces will soften in the pan; the green tops are best added near the end so they stay fresh and colorful.
- Coat the pork lightly. Put the pork strips in a bowl, sprinkle over the 2 tablespoons of cornstarch and black pepper, and toss until the surfaces have a thin, even dusting. Shake off loose clumps. A light coating encourages browning and helps the sauce cling; a thick, pasty layer can turn gummy. Keep the coated pork separate from the sauce ingredients until it goes into the pan.
- Sear in batches. Heat a large skillet or wok over medium-high heat for about 1 minute, then add the neutral oil and swirl to coat the base. Add half the pork in a single layer, leaving a little space between pieces. Sear for about 3 to 4 minutes total, turning once, until browned and nearly cooked through. Transfer to a clean plate and repeat with the remaining pork. If the pan looks dry, add a small splash of oil rather than crowding the meat; crowded strips steam and are less likely to brown.
- Build the sauce. Lower the heat to medium. Add the white parts of the green onions, garlic, ginger, and red pepper flakes if using. Stir for about 30 seconds, just until fragrant; garlic can become bitter if it browns deeply. Pour in the soy mixture and bring it to a gentle bubble, stirring to loosen the browned bits from the pan. Simmer for about 2 minutes so the sugar dissolves fully and the sauce begins to look glossy.
- Finish the pork safely. Return the pork and any juices on the plate to the pan. Toss and cook for about 2 minutes, turning the strips so they are coated. Check the thickest pieces with a food thermometer: the USDA FSIS safe minimum for whole cuts of pork is 145°F (63°C), followed by a 3-minute rest. If the pork has not reached that temperature, keep cooking and check again. Once it has, remove the pan from the heat and let the pork rest for 3 minutes before serving.
- Adjust and garnish. Stir in the toasted sesame oil and most of the green onion tops. If you prefer a thicker sauce, mix the optional teaspoon of cornstarch with 1 tablespoon cold water until smooth, stir it into the bubbling sauce before the resting period, and cook for 30 to 60 seconds. Taste a little sauce and add a spoonful of water if it is too intense, or a pinch of sugar if you want it sweeter. Finish with sesame seeds and the remaining green onion tops.
Tips
- Slice across the grain. Look for the long muscle fibers and cut across them, not parallel to them. This shortens the fibers and gives the strips a less chewy bite. A brief 10-minute chill in the freezer can firm the tenderloin and make even slicing easier, but it is optional and is not included in the recipe timing.
- Use a roomy pan and work in batches. A skillet that is too crowded traps moisture, so the pork steams instead of browning. If you do not have a wok or a large skillet, sear the pork in three smaller batches and keep the finished pieces on a clean plate.
- Choose the right soy sauce. Low-sodium soy sauce gives you more control over the final saltiness. Regular soy sauce works, but the finished sauce may taste saltier, so start with a little less and add more after tasting. Tamari is a useful substitute; check its label if gluten avoidance matters to you.
- Watch the sugar and garlic. Brown sugar helps the sauce become shiny, but it can scorch over very high heat. Keep the sauce at a gentle bubble, and add garlic only after lowering the heat. If the sauce gets too thick before the pork is ready, loosen it with water a tablespoon at a time.
Serving Suggestions
Serve the pork as soon as it is rested, while the sauce is warm and glossy. Steamed jasmine rice is a natural base because it catches the sauce without competing with its sweet-salty flavor; brown rice or plain noodles work too. For a complete plate, add a green vegetable such as broccoli, bok choy, snap peas, or green beans. Steam or stir-fry the vegetable separately so it keeps its color and does not water down the sauce.
For a more substantial meal, spoon the pork and sauce over rice bowls and add thinly sliced cucumber or shredded carrot for crunch. A squeeze of lime can brighten the sweet sauce, though it is not essential. Keep extra sauce in the pan rather than pouring it all over the rice at once, so each diner can choose how saucy to make their serving. The recipe serves four as a main dish when paired with rice and vegetables.
Variations
Make it spicier: Increase the red pepper flakes, or add a small amount of chili crisp at the table. Adding chili crisp directly to the pan can change the sauce’s salt and oil balance, so taste before adding extra soy sauce. For a mild version, leave out the flakes entirely; ginger and garlic still give the dish plenty of flavor.
Use another cut: Pork loin can replace tenderloin, but it is often wider and less tender, so slice it thinly across the grain and check it carefully as it cooks. Chicken breast or thigh also works, but poultry must reach 165°F (74°C) measured with a food thermometer. Beef strips are another option; cook whole cuts to 145°F (63°C) with a 3-minute rest. These swaps change the cooking time, so use temperature rather than the pork timing as your guide.
Adjust the sweetness or make it gluten-free: For a less sweet sauce, reduce the brown sugar to 3 tablespoons (about 41 g), then taste before adding more. Coconut sugar can stand in for brown sugar, though it has a deeper, less caramel-like flavor. To make the dish gluten-free, use certified gluten-free tamari and confirm that the cornstarch and other packaged ingredients are suitable. The result remains savory and glossy, but the exact saltiness may differ by brand.
Storage and Reheating
Refrigerate leftover pork within 2 hours of cooking, in a covered shallow container. It keeps for 3 to 4 days in the refrigerator. Store rice separately when possible so it does not absorb all the sauce; cooked rice should also be chilled promptly. If you will not use the pork within that window, freeze it in an airtight freezer-safe container for up to 2 months for best quality. Thaw it overnight in the refrigerator rather than on the counter.
For the best texture, reheat a portion in a skillet over medium-low heat with 1 or 2 tablespoons of water. Stir gently until steaming hot throughout, and check that leftovers reach 165°F (74°C). The water loosens the sauce, which thickens as it chills. A microwave also works: cover loosely, heat in short intervals, and stir between intervals so the center warms evenly. Avoid repeatedly reheating the whole batch; warm only the amount you plan to eat.
Frequently Asked Questions
Is Mongolian pork actually from Mongolia?
This recipe is a home-style, American-Chinese takeout-inspired dish, not a claim about a traditional Mongolian preparation. “Mongolian” restaurant-style dishes have varied versions, often pairing a sweet-savory soy sauce with meat and scallions. This version uses pork tenderloin and a quick ginger-garlic sauce, so it is best described as Mongolian-style pork.
Can I make the sauce ahead?
Yes. Whisk the soy sauce, water, brown sugar, and rice vinegar together and refrigerate the mixture in a covered container for up to 2 days. Minced garlic and grated ginger can also be prepared ahead and kept covered in the refrigerator, but keep them separate from the sauce until cooking if you want the freshest flavor. Stir the sauce again before adding it to the hot pan because sugar can settle at the bottom.
Why is my pork tough?
Pork can turn tough if it is cut with the grain, sliced unevenly, or cooked well beyond its safe temperature. Cut across the grain, keep the strips close in thickness, and use a thermometer on the thickest pieces instead of relying only on color. A crowded pan can also make the cooking uneven, so sear in batches and allow the required 3-minute rest after the pork reaches 145°F (63°C).
Can I make this without cornstarch?
Yes. The pork can be seared without a coating, though the sauce may cling less closely and will be thinner. For a gluten-free thickener, cornstarch is already a practical choice; arrowroot can also thicken the sauce, but it may become slippery if boiled for too long. Mix any separate thickener with cold water first to prevent lumps, and add it gradually while the sauce bubbles.
Can I cook the pork and sauce in advance?
You can cook the dish ahead and refrigerate it, but tenderloin is juiciest when freshly cooked. If planning ahead, prepare the sauce and slice the aromatics in advance, then sear and finish the pork shortly before serving. For a fully cooked make-ahead meal, cool and refrigerate it promptly, then reheat only once until it reaches 165°F (74°C). Add a little water during reheating to restore the sauce’s consistency.
Related
- Mongolian Lamb Recipe: Chinese-Style Stir-Fry with Ginger and Garlic
- Slow Cooker Mongolian Beef with Kimchi
- Mongolian Steak Recipe with a Glossy Ginger-Garlic Sauce
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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