Spinach and Feta Cheese Tortellini

Name: Spinach and Feta Cheese Tortellini
Ingredients: 4 tablespoons butter; 3 cloves garlic, chopped; 4 tablespoons flour (rice flour for gluten-free); 3 cups milk; 1/4 teaspoon nutmeg (optional); salt and pepper to taste; 1/4 cup parmigiano reggiano (parmesan), grated; 1 cup mozzarella, shredded; 10 ounces spinach (thawed frozen or wilted fresh); 1 cup feta, crumbled; 1 tablespoon dill, chopped; 1 tablespoon parsley, chopped; 3 green onions, thinly sliced; 1 pound cheese tortellini, cooked (gluten-free for gluten-free)