Preheat oven to 375 degrees Farenheit.
Heat a large skillet over medium-high heat.
Add in ground beef, ground Italian sausage and chopped onion. Cook until beef is browned. Drain any excess grease.
Add in pizza sauce and simmer for 3-5 minutes.
Stir in sour cream.
Spread mixture in a 9x13 inch casserole dish.
Top with shredded mozzarella cheese and pizza toppings like pepperoni and olives.
Top with crescent roll sheet, then brush with melted butter.
Bake at 375 degrees for 20-30 minutes, or until the crescent top is golden brown.