Preheat oven to 375.
In a large skillet, heat olive oil over medium heat and add the sliced onion; cook for 3 minutes.
Add minced garlic and mushrooms; cook until mushrooms are tender.
Add beef and season with salt, pepper, oregano and basil; continue to cook until meat is browned.
Stir in tomato sauce and cook for 3 minutes.
Grease a round 8-inch baking dish with butter.
Spread the cream cheese on the bottom of the dish.
Spread the meat mixture over the cream cheese, and top with mozzarella cheese and cheddar cheese.
Bake for 15 to 20 minutes, or until hot and bubbly.
Calories: 353 kcal | Carbohydrates: 6 g | Protein: 14 g | Fat: 30 g | Saturated Fat: 14 g | Cholesterol: 85 mg | Sodium: 479 mg | Potassium: 359 mg | Fiber: 1 g | Sugar: 3 g | Vitamin A: 840 IU | Vitamin C: 4.5 mg | Calcium: 176 mg | Iron: 1.6 mg | Net Carbs: 5 g
Nutritional info is an estimate and provided as courtesy. Values may vary according to the ingredients and tools used. Please use your preferred nutritional calculator for more detailed info.