Salad Lyonnaise with Poached Egg and Bacon

Salad Lyonnaise is a French salad associated with Lyon, traditionally made with bitter frisée, crisp bacon, a warm vinaigrette, and a poached egg. The rich yolk and savory dressing balance the greens, while crunchy croutons make the salad substantial enough for lunch or a light supper.

Ingredients

8 cups (about 200 g) frisée, washed, thoroughly dried, and torn into bite-size pieces
6 ounces (170 g) thick-cut bacon, cut into ½-inch (1.25 cm) pieces
4 large eggs
2 cups (about 100 g) crusty bread, cut into ½-inch (1.25 cm) cubes
1 tablespoon (15 ml) olive oil, plus a little more if needed for the croutons
1 small shallot, finely minced, about 2 tablespoons (20 g)
1 tablespoon (15 g) Dijon mustard
2 tablespoons (30 ml) red wine vinegar
2 tablespoons (30 ml) warm bacon drippings, skimmed of any browned bits
2 tablespoons (30 ml) extra-virgin olive oil
1 tablespoon (15 ml) white vinegar, for the poaching water
¼ teaspoon (1.5 g) fine salt, plus more to taste
¼ teaspoon (0.5 g) freshly ground black pepper, plus more to taste
1 tablespoon (3 g) chopped fresh chives, optional, for serving

Instructions

Prepare the greens and cooking station, 15 minutes. Rinse the frisée well, checking between the leaves for grit, then dry it thoroughly in a salad spinner or with clean towels. Tear larger leaves into manageable pieces and chill them while you prepare the rest. Mince the shallot, cut the bacon and bread, and set a medium saucepan of water on the stove so it can heat while you cook. Dry leaves matter: water left clinging to them dilutes the dressing and makes it slide to the bottom of the bowl.
Toast the croutons, 5 minutes. Heat the tablespoon of olive oil in a skillet over medium heat. Add the bread cubes and toss frequently until browned and crisp on several sides, about 5 minutes. If they look dry before they color, add a small splash of oil. Transfer the croutons to a plate. They will crisp a little more as they cool; avoid leaving them in the hot pan, where they can scorch.
Cook the bacon, 10 minutes, then rest it for 3 minutes. Put the bacon in the same skillet and cook over medium heat, stirring now and then, until browned and crisp, usually 8–10 minutes depending on thickness. For a food-safety check, use thick pieces and a thermometer: USDA FSIS gives 145°F (63°C) with a 3-minute rest as the safe minimum for pork whole cuts. Drain the bacon on a paper towel-lined plate and let it rest for 3 minutes. Pour off excess drippings, leaving about 2 tablespoons (30 ml) in the pan; strain out any blackened bits if needed.
Make the warm vinaigrette, 2 minutes. Turn off the heat under the skillet. Stir the minced shallot into the warm bacon drippings and let it soften for about 30 seconds without browning. Whisk in the Dijon and red wine vinegar, then slowly whisk in the extra-virgin olive oil. Season with the salt and pepper. The dressing should taste bright and savory, not oily; whisk again just before using if it separates. If it tastes too sharp, add a teaspoon of water rather than more oil.
Poach the eggs, about 10 minutes including heating the water. Bring the saucepan of water to a gentle simmer, not a rolling boil, and add the white vinegar. Crack each egg into a small cup. Swirl the water gently and slide in one egg at a time; poach until the white is set, about 3–4 minutes, then lift each egg out with a slotted spoon and briefly drain it on a clean towel. USDA FSIS recommends that egg dishes reach 160°F (71°C), checked with a food thermometer; cooking a poached egg to that temperature will set the yolk. A soft, runny yolk is customary in this salad but is undercooked, so use pasteurized eggs if choosing that texture, particularly when serving people at higher risk from foodborne illness.
Dress and serve, 2 minutes. Put the frisée in a large bowl and toss it with most of the warm vinaigrette until the leaves are lightly coated. Divide among four plates and scatter on the bacon and croutons. Set a warm poached egg on each portion, spoon over the remaining dressing, and finish with chives and a little black pepper. Serve immediately, before the greens wilt or the croutons soften.

Tips

Dry the frisée well. A damp salad can taste watery even when the vinaigrette is well seasoned. If you wash the greens ahead, spin them dry and store them wrapped in a clean towel in the refrigerator. Keep the dressing separate until serving.
Use a suitable bacon substitute if needed. Thick-cut bacon gives the dressing its smoky, salty base. Pancetta works well, though it is usually less smoky; diced smoked ham is convenient but tends to be leaner, so add a little olive oil to replace missing drippings. For a meat-free version, use sautéed mushrooms and olive oil, knowing the result will be less smoky and savory.
Keep the poaching water calm. Vigorous boiling can break up the whites and make the eggs tough. A gentle simmer is enough. Very fresh eggs usually hold together better; if an egg spreads, remove loose wisps with a slotted spoon before lifting it out.
Season in stages. Bacon and Dijon both contribute salt, so taste the dressing before adding more. If frisée is especially bitter, balance it with a little extra vinaigrette or a few more croutons rather than masking it with a large amount of salt.

Serving Suggestions

Serve Salad Lyonnaise as a first course before roast chicken, grilled fish, or a simple vegetable main. It is also a complete light meal with a larger portion of greens and bread on the side. A crisp baguette is useful for catching any dressing and egg yolk left on the plate; warm it briefly in the oven while you prepare the salad, or serve it at room temperature.

For a relaxed brunch, pair the salad with roasted potatoes or a bowl of seasonal fruit. For a more filling supper, add a cup of vegetable soup or a small portion of lentils. Keep any side dish simply seasoned, since the bacon, mustard, and warm dressing already bring plenty of flavor. The salad is best served as soon as it is assembled, so have plates and sides ready before poaching the eggs.

Variations

Frisée is the classic choice because its slightly bitter, curly leaves stand up to the warm dressing. If it is unavailable, use a mixture of curly endive, escarole, and tender lettuce. Escarole is milder and sturdier, while ordinary lettuce gives a softer, less bitter salad. Chicory or Belgian endive can add a pleasant bitter edge, but slice those leaves thinly so they are easy to eat.

Traditional versions vary in their exact balance of greens, bacon, bread, and dressing, and home cooks often adapt the salad to what is available. Use lardons or pancetta instead of bacon for a different cured-pork flavor. Swap red wine vinegar for sherry vinegar for a rounder, slightly deeper tang. A little minced garlic can be rubbed around the warm pan before making the dressing, but use only a small amount so it does not overpower the egg and frisée.

To make a heartier plate, add a few sliced radishes or a small handful of tender herbs. These are additions rather than replacements for the defining combination of bitter greens, pork, vinaigrette, and egg. For a vegetarian variation, omit the bacon, crisp mushrooms in olive oil, and season the dressing with a pinch of smoked paprika. The salad will be less traditional, but the mushrooms provide a similarly savory bite.

Storage and Reheating

This salad is at its best freshly assembled. Do not dress the full batch if you expect leftovers: keep the frisée, bacon, croutons, dressing, and eggs in separate covered containers. Refrigerate perishable components within 2 hours of cooking. The greens are best used within 1–2 days, while cooked bacon and dressing can generally be refrigerated for 3–4 days. Keep croutons at room temperature in an airtight container and use them within a day or two, since they lose their crunch in the refrigerator.

Poached eggs are most appealing freshly made. If you need to prepare them ahead, cool them promptly in cold water, cover, and refrigerate; use within 1 day for best quality. Rewarm gently in hot water just before serving, rather than microwaving, which can make them rubbery or cause them to burst. Reheat bacon and dressing separately until hot, and assemble with fresh greens and croutons. If reheating leftovers that include cooked egg or bacon, heat them to 165°F (74°C), the USDA FSIS temperature for leftovers; do not reheat dressed greens, which will wilt.

Frequently Asked Questions

Can I make Salad Lyonnaise without frisée?
Yes. Curly endive or escarole are the closest practical substitutes. A mix of bitter leaves and mild lettuce gives a similar balance, though a bowl made mostly with soft lettuce will wilt more quickly under warm dressing. Dry whichever greens you use thoroughly.

Can I prepare any part of the salad in advance?
Yes. Wash and dry the greens, cut the bread and bacon, mince the shallot, and make the dressing earlier in the day. Store each component separately in the refrigerator, and make or rewarm the croutons shortly before serving. Poach the eggs last so they are warm and the whites have a good texture.

How do I keep a poached egg from spreading?
Use fresh eggs, crack each one into a cup first, and slide it gently into water that is barely simmering. Avoid adding too many eggs at once; a roomy pan makes it easier to keep them separate. A small amount of vinegar helps the white set sooner, but it cannot compensate for water that is boiling hard.

Is the yolk supposed to be runny?
Many classic-style servings have a soft yolk that spills over the greens when cut. A runny yolk is not cooked to the USDA FSIS recommendation of 160°F (71°C) for egg dishes. For the recommended temperature, cook until the yolk is set and check with a food thermometer; pasteurized eggs are a lower-risk choice if you prefer a soft yolk.

What can I use instead of bacon drippings?
Use olive oil, or use a tablespoon of oil plus a little butter for a fuller flavor. The dressing will lose the smoky, salty character that bacon drippings provide, so taste and adjust the mustard, vinegar, and seasoning. If you use pancetta or another fatty cured pork, its cooking fat can take the place of bacon drippings.

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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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