Boursin Chicken Baked Ziti

Name: Boursin Chicken Baked Ziti
Ingredients: 1/2 cup freshly grated pecorino Romano cheese; 2 Tablespoons Italian-style breadcrumbs; 1/2 pound ziti pasta; 1 Tablespoon unsalted butter; 1/2 cup chopped onion; 1 clove garlic, minced; 1 teaspoon dried Italian herb seasoning; 1/2 teaspoon red pepper flakes, or to taste; 1 cup chopped cooked chicken; 1 cup chopped fresh spinach; 1 1/2 cups heavy cream; 1 5.2 ounce package Boursin Garlic and Herb Gournay Cheese fix branding; 1/2 cup shredded mozzarella cheese