4ozOnion, thinly sliced (julienned)(approx.100 g) 1 medium onion
4ozCarrots thinly sliced into rounds(approx.100 g) approx. 2 medium carrots
2Garlic cloves(whole)
4ozLeek sliced into rings(approx.100 g) 1 medium leek
1lbChicken tenderloins or chicken breasts: cut into uniform cubes(approx. 450-500 g)
0.5lbMushrooms: sliced(approx. 250g or 9 oz)
1tbspTomato sauceor 1/2 tbsp tomato paste
400mlChicken or beef stockapprox. 1 3/4 cups. Homemade is best; otherwise, use a low-sodium store-bought version.
200gFresh spinach:approx. 7 oz or 4-5 cups packed.
1tbspExtra virgin olive oil.
1tspSea salt.
Freshly ground black pepper to taste.
Instructions
Layer the ingredients: Prep the vegetables and place them in the slow cooker (Crockpot) in the following order: onion, carrots, garlic, leeks, tomato sauce, chicken, and mushrooms.
Slow cook: Pour in the stock. Cover and cook for a total of 3 hours. Set to High for the first hour, then switch to Low for the remaining 2 hours.
Add greens: Finally, stir in the fresh spinach and cook for one additional hour on Low.
Serve: Ladle the soup into bowls and enjoy a deeply flavorful and comforting meal.
Notes
Conventional Stovetop Method: If you don't have a slow cooker, you can make this soup in a standard pot. Bring to a boil, then reduce heat to the lowest setting to let it simmer gently (the Spanish "chup-chup" style) for one to two hours. This method requires less total time.Traditional Sauté: If using the stovetop method, you can start by sautéing the onion, garlic, leeks, and tomato sauce in olive oil. Then add the chicken and mushrooms, followed by the stock. Add the spinach during the last few minutes of cooking, as it wilts very quickly.