In a large skillet over medium heat, brown the ground beef and Italian sausage along with the diced onion and minced garlic. Once cooked, drain any excess grease.
Stir in the spaghetti sauce and seasonings, letting the mixture simmer on low heat while you prepare the cheese mixture
In a large mixing bowl, combine the cottage cheese, sour cream, grated Parmesan, Boursin cheese, and shredded mozzarella. Mix until well combined
Preheat the oven to 400°F
In a 9x13 baking dish, spread 1/3 of the meat mixture on the bottom. Layer half of the frozen cheese ravioli over the sauce, followed by half of the cheese mixture. Repeat the layers, finishing with the remaining meat sauce.
Top with 3 cups of shredded mozzarella cheese. Wrap the dish tightly in foil and bake for 30 minutes. Remove the foil and bake for an additional 10-15 minutes until the cheese is golden brown and bubbly.
Once out of the oven, sprinkle with fresh chopped parsley for a touch of color.