Grits and Greens Casserole

Name: Grits and Greens Casserole
Ingredients: Nonstick cooking spray, for spraying the baking dish; 2 cups half-and-half; 8 cups chicken stock; 2 cups grits, such as Quaker Old Fashioned; 6 slices bacon, cut into small pieces; 1 medium sweet onion, such as Vidalia, finely chopped; One 16-ounce package frozen collard greens, thawed; 1 3/4 cups grated Parmesan (6 ounces); 1/2 cup (1 stick) unsalted butter; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1 cup shredded Monterey jack cheese