White Bean and Rosemary Soup

Name: White Bean and Rosemary Soup
Ingredients: 2 tablespoons olive oil; 1 cup onions, diced; 1 cup carrots, diced; 1 cup celery, diced; 3 cloves garlic, chopped; 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried); 1 pinch red pepper flakes (optional); 4 cups chicken broth (or vegetable broth); 3 (14.5) ounce cans white beans, rinsed and drained; 2 teaspoons fresh rosemary, chopped (or 1 teaspoon dried); 1/4 cup parmigiano reggiano (parmesan cheese), grated; 2 tablespoons lemon juice; 1 tablespoon parsley, chopped; salt and pepper to taste