Lentil & Veggie Soup

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This soup is my secret weapon for exhausted parents who want to do the right thing nutritionally but don't have the energy for elaborate cooking. One pot, 45 minutes total, six generous servings — and a soup so rich in brain-nourishing nutrients that it genuinely moves the needle for children with ADHD. Red lentils are one of the most iron-dense plant foods available, and iron deficiency is one of the most consistently documented nutritional imbalances in ADHD. Iron is essential for the synthesis and regulation of dopamine — the very neurotransmitter at the center of attention and impulse control. Combined with folate, zinc, and fiber from the vegetable medley, this humble pot of soup is doing serious therapeutic work. I make a double batch every Sunday and it feeds our family for half the week.

Ingredients

• 1½ cups red lentils, rinsed well
• 2 tablespoons extra-virgin olive oil
• 1 large onion, diced
• 4 garlic cloves, minced
• 2 large carrots, peeled and diced
• 2 stalks celery, diced
• 1 large sweet potato, peeled and cubed
• 1 can (400g) diced tomatoes
• 6 cups low-sodium vegetable broth or water
• 2 teaspoons ground cumin
• 1 teaspoon ground turmeric
• 1 teaspoon smoked paprika
• ½ teaspoon ground coriander
• Sea salt and black pepper to taste
• 2 large handfuls baby spinach or kale, roughly chopped
• Juice of 1 lemon
• Fresh parsley or cilantro for serving

Instructions

1. Heat the olive oil in a large heavy-bottomed pot over medium heat. Add the diced onion and a pinch of salt, and cook, stirring occasionally, for 5–7 minutes until the onion is soft and beginning to turn golden. Don't rush this step — properly softened onion builds a flavor base that makes the whole soup sing.
2. Add the minced garlic, cumin, turmeric, smoked paprika, and coriander. Stir constantly for about 60 seconds until the spices are fragrant. This process — called "blooming" spices — releases the fat-soluble compounds that give the soup its depth and also enhances the bioavailability of curcumin (the active compound in turmeric, a powerful anti-inflammatory).
3. Add the diced carrots, celery, and sweet potato. Stir to coat everything in the spiced onion mixture. Cook for 2 minutes, then pour in the canned tomatoes and stir to combine.
4. Add the rinsed red lentils and vegetable broth. Stir everything together, bring to a boil, then reduce heat to a gentle simmer. Cook uncovered for 25–30 minutes, stirring occasionally, until the lentils have completely dissolved and the soup is thick and creamy. Red lentils don't need soaking and cook quickly — one of their great advantages.
5. Stir in the chopped spinach or kale and let it wilt for 2–3 minutes. Squeeze in the lemon juice and taste for seasoning — adjust salt, pepper, and lemon to your preference. The lemon is essential: it brightens everything and, nutritionally, the vitamin C dramatically increases iron absorption from the lentils.
6. Ladle into bowls, top with fresh parsley or cilantro, and serve with a slice of whole-grain sourdough if your family tolerates gluten. Leftovers keep in the fridge for 5 days and freeze beautifully for up to 3 months.