keto soup recipe

Ingredients: 4 cups broccoli florets (fresh or frozen) 2 cups chicken broth 1 cup heavy cream 1 cup shredded cheddar cheese 1/2 cup grated Parmesan cheese 2 cloves garlic, minced 1/2 small onion, finely chopped 2 tablespoons butter Salt and pepper to taste 1/4 teaspoon nutmeg (optional)