pasta e fagioli recipe

#### Ingredients: - **2 tablespoons olive oil** - **1 onion** (chopped) - **2 carrots** (chopped) - **2 celery stalks** (chopped) - **3 cloves garlic** (minced) - **1/2 teaspoon red pepper flakes** (optional, for heat) - **1 can (15 oz) cannellini beans** (drained and rinsed) - **1 can (15 oz) diced tomatoes** (with their juice) - **4 cups vegetable broth** (or chicken broth) - **1 cup water** - **1 teaspoon dried oregano** - **1 teaspoon dried basil** - **1 bay leaf** - **Salt and black pepper** (to taste) - **1 cup ditalini pasta** (or other small pasta) - **2 cups fresh spinach** (chopped, optional) - **1/4 cup grated Parmesan cheese** (for serving) - **Fresh parsley** (chopped, for garnish)