Heat oven to 375°F. In large skillet, brown ground beef and onion until thoroughly cooked. Drain. Add tomato sauce, tomato paste, mushrooms, basil, 1 teaspoon parsley flakes, oregano, salt, garlic salt and pepper; mix well. Reduce heat; simmer 15 minutes.
In small bowl, combine cottage cheese and spinach; mix well. In ungreased 12x8-inch (2-quart) glass baking dish, layer half each of meat mixture, cottage cheese mixture and mozzarella cheese; repeat layers.
Separate dough into 10 biscuits. Separate each biscuit into 3 layers; arrange biscuits over cheese layer, overlapping slightly. Sprinkle with 1 tablespoon parsley flakes.
Bake at 375°F. for 25 to 30 minutes or until golden brown. Let stand 5 minutes before serving.