Light Soup Options: Easy Vegetable, Chicken, and Lentil Soups

Light soup options can be brothy, vegetable-forward meals that feel satisfying without relying on cream or heavy sauces. This flexible recipe makes a lemony vegetable soup with white beans, and includes practical ways to turn it into chicken or lentil soup; serve it hot as a starter or a simple meal with bread.

Ingredients

1 tablespoon (15 ml) olive oil
1 medium yellow onion, about 1 cup (150 g), diced
2 medium carrots, about 1 cup (130 g), diced
2 celery stalks, about 1 cup (100 g), diced
2 garlic cloves, finely chopped
1 teaspoon (1 g) dried thyme
6 cups (1.4 L) low-sodium vegetable broth
1 medium zucchini, about 1½ cups (200 g), diced
1 can white beans, 15 ounces (425 g), drained and rinsed
1 cup (150 g) frozen peas
½ teaspoon (3 g) fine salt, plus more to taste
¼ teaspoon (0.5 g) black pepper
2 tablespoons (30 ml) fresh lemon juice, or to taste
¼ cup (10 g) chopped fresh parsley

Instructions

Prepare the vegetables. Dice the onion, carrots, celery, and zucchini into small, similar-sized pieces so they cook evenly. Drain and rinse the beans, chop the garlic and parsley, and squeeze the lemon. This preparation takes about 15 minutes.
Soften the aromatics. Heat the olive oil in a large pot over medium heat. Add the onion, carrots, celery, salt, and pepper. Cook for 6 to 8 minutes, stirring occasionally, until the onion is translucent and the carrots begin to soften. Avoid browning them heavily; a gentle sauté keeps the broth clean-tasting.
Add garlic and thyme. Stir in the garlic and dried thyme and cook for 30 seconds, just until fragrant. If the garlic starts to brown, lower the heat so it does not become bitter.
Simmer the broth and firm vegetables. Pour in the vegetable broth and add the zucchini. Bring the soup to a boil, then reduce the heat to maintain a steady simmer. Cook uncovered for 12 to 15 minutes, until the carrots and zucchini are tender but still hold their shape.
Finish with beans and peas. Stir in the rinsed beans and frozen peas. Simmer for 4 to 5 minutes, until both are hot throughout. Taste a bean and a piece of carrot to check the texture; keep simmering briefly if you prefer softer vegetables.
Season and serve. Remove the pot from the heat. Stir in the lemon juice and parsley, then taste and adjust the salt, pepper, and lemon. Add a little hot broth or water if the soup seems too concentrated. Ladle into bowls and serve hot.

Tips

Cut vegetables evenly. Small, consistent pieces cook at a similar pace. If the carrots are larger than the zucchini, add the carrots to the broth a few minutes earlier so the zucchini does not turn mushy while they soften.
Keep the simmer gentle. A rolling boil can break apart the beans and vegetables and evaporate broth quickly. If the soup reduces more than you like, stir in water or broth and recheck the seasoning.
Adjust salt after adding broth. Broths vary in saltiness, and canned beans may retain some salt. Starting with a modest amount and tasting near the end is more reliable than seasoning heavily at the beginning.
Use lemon at the end. Fresh lemon brightens the finished soup. Add it off the heat and a little at a time; prolonged boiling dulls its fresh flavor, and too much can overpower the vegetables.

Serving Suggestions

Serve a generous bowl with whole-grain toast, crusty bread, or a small grilled cheese sandwich. For a lighter first course, ladle smaller portions before a main dish such as roasted fish or a grain salad. A spoonful of chopped parsley, a pinch of black pepper, or a few drops of olive oil makes a simple garnish. For a more substantial bowl without changing the soup’s brothy character, serve it over a small scoop of cooked rice, barley, or small pasta in each serving bowl; keep leftover grains separate so they do not absorb all the broth.

Variations

Chicken vegetable soup: Replace the vegetable broth with low-sodium chicken broth and add 2 cups (280 g) cooked, shredded chicken with the beans and peas. Heat until steaming throughout. If starting with raw chicken, simmer it separately or in the soup until the thickest part reaches 165°F (74°C), checked with a food thermometer; the USDA FSIS safe minimum for poultry is 165°F (74°C). Remove it, shred it, and return it to the pot. Use a clean thermometer and do not rely on color alone.

Red lentil soup: Replace the white beans with ¾ cup (145 g) dried red lentils, rinsed, and add them with the broth. Simmer until tender, usually 15 to 20 minutes, checking the package directions; add the zucchini during the final 10 to 12 minutes so it does not overcook. Red lentils soften and thicken the broth more than canned beans, so add extra broth or water if needed.

Greens and seasonal vegetables: Replace the zucchini with chopped green beans or diced summer squash. Stir in 2 cups (60 g) baby spinach during the last minute, just until wilted, or use 1 cup (30 g) chopped kale and simmer it for 5 to 8 minutes. Swap dried thyme for 1 teaspoon (2 g) dried oregano if that better suits the vegetables you have.

Make it vegan or more filling: The main recipe is already plant-based when made with vegetable broth. For extra body, mash a few beans against the side of the pot and stir them back in. If you want a clear, delicate broth, leave the beans whole and avoid blending the soup.

Storage and Reheating

Cool the soup promptly and refrigerate it within 2 hours of cooking in shallow, covered containers. It keeps for 3 to 4 days in the refrigerator. Reheat only the portion you plan to eat on the stovetop over medium heat, stirring occasionally, or in the microwave in a covered, microwave-safe bowl with a vent. Heat leftovers to 165°F (74°C), checking with a food thermometer, and bring soup to a steady simmer. Add a splash of broth or water if it has thickened.

For longer storage, freeze cooled soup in airtight, freezer-safe containers, leaving a little space for expansion; use within about 2 to 3 months for best quality. Thaw overnight in the refrigerator or reheat from frozen over low heat, stirring as it loosens, then bring it to 165°F (74°C). The vegetables may soften slightly after freezing, but the soup remains suitable for a quick meal. Do not leave soup at room temperature for more than 2 hours, or more than 1 hour when the temperature is above 90°F (32°C).

Frequently Asked Questions

What makes a soup “light”?
A light soup is usually broth-based and emphasizes vegetables, herbs, or lean protein rather than cream, large amounts of cheese, or a thick roux. The term is not a strict culinary category, so it can describe different soups depending on the cook and serving size.

Can I make this soup without beans?
Yes. Leave them out and add another cup (150 g) of vegetables, or include ½ cup (90 g) of rinsed, cooked rice or small pasta near the end. Cook pasta separately if you plan to keep leftovers, since it continues absorbing broth as it sits.

Can I use fresh peas instead of frozen?
Yes. Add shelled fresh peas with the beans and simmer until tender, usually 3 to 5 minutes. Pea size and freshness affect the time, so taste one before taking the pot off the heat.

Why did my soup become too salty?
Saltiness often comes from broth or canned ingredients. Stir in unsalted broth or water a little at a time, then add extra vegetables or beans if you have them. A small additional squeeze of lemon can balance the flavor, but it will not remove salt.

Can I blend this soup?
Yes, but blending changes its texture from brothy to creamy. For a partly smooth soup, blend one or two cups (240–480 ml) and return it to the pot. If using a countertop blender, blend hot liquid in small batches and vent the lid according to the appliance instructions to prevent steam pressure from building.

Can I prepare it ahead?
Yes. Make the soup up to 3 to 4 days ahead and refrigerate it promptly. For the freshest texture, add the lemon juice and parsley after reheating rather than before storage.

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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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