Cook noodles as per package directions; drain and set aside.
Preheat oven to 350 degrees F. Lightly spray a 11 x 7-inch baking dish
In a large skillet, brown the ground beef, onion, garlic and mushrooms.
Stir in the soup, tomato paste, sour cream, salt, pepper and sugar
Mix the drained noodles into the ground beef mixture. Place in prepared baking dish.
Mix panic crumbs with melted butter; distribute crumbs on top of casserole.
Bake for 30-35 minutes or until casserole is bubbling and crumbs are golden.