In a large dutch oven, heat oil and sautè onion, garlic, carrots, and celery for about 8-10 minutes until it begins to soften.
1 tablespoon olive oil, 1 large onion, 3 garlic cloves, 4 medium carrots, 4 celery stalks
If adding sausage, add here and cook until browned, about 5 minutes.
1 pound mild Italian sausage
Add salt, pepper, and Italian seasoning and stir.
1 teaspoon salt, 1 teaspoon black pepper, 2 teaspoons Italian seasoning
Add broth, beans, tomato paste, bay leaf, lemon. Scrape the bottom of the pot once liquid is in to release any stuck on bits. Bring to a boil then reduce heat and let simmer for 15 minutes.
6-8 cups chicken or veggie broth, 2 15- ounce cans cannellini beans, 2 tablespoons tomato paste, Bay leaf, 1/2 lemon
Discard the bay leaf then transfer about 3 cups worth of soup to a blender. Blend until smooth.
Transfer back to the pot and stir well to combine. Add in the kale or spinach and let it wilt for a few minutes.
2 cups chopped kale or spinach, Optional: parmesan rind to simmer, or sprig of rosemary, sage
Taste and adjust flavors as desired. I usually add a bit more lemon juice, salt and pepper!
Garnish and serve.
Optional: 1/4 cup grated parmesan cheese, Fresh parsley