Method
Step 1: Prepare the Beans
If you're using dried Borlotti beans, soak them overnight in plenty of water. Drain and rinse them before cooking. If using canned beans, simply drain and rinse them to remove excess sodium.
Step 2: Sauté the Vegetables
In a large pot, heat the olive oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes. Then, add the minced garlic, diced carrots, and diced celery, cooking for an additional 5-7 minutes until the vegetables soften.
Step 3: Add Tomatoes and Beans
Stir in the diced tomatoes, along with the soaked (or canned) Borlotti beans. Mix well to combine all the ingredients.
Step 4: Add Broth and Seasonings
Pour in the vegetable broth, add the bay leaf, and sprinkle in the dried thyme. Bring the mixture to a boil, then reduce the heat to low. Simmer the soup for about 1 hour, or until the beans are tender (if using dried beans, it may take longer).
Step 5: Blend (Optional)
After the beans are tender, you can use an immersion blender to puree some of the soup for a creamier texture while leaving some beans whole for added texture. This step is optional and depends on your texture preference.
Step 6: Season and Serve
Remove the bay leaf, and season the soup with salt and pepper to taste. Ladle the soup into bowls, garnish with chopped parsley, and sprinkle with grated Parmesan cheese if desired.
Variations
Add Greens: Stir in some chopped kale or spinach in the last 10 minutes of cooking for added nutrients.
Spicy Version: Add red pepper flakes for a bit of heat.
Meat Option: For a heartier soup, add diced pancetta or Italian sausage during the sautéing step.