Preheat oven to 375°F (190°C).

In a large skillet, heat olive oil over medium heat and add the thinly sliced onion; cook for 3 minutes until softened.

Add minced garlic and cremini mushrooms; cook until mushrooms are tender, about 3-5 minutes.

Add ground beef to the skillet and season with salt, pepper, dried oregano, and freeze dried basil; continue to cook, breaking up the meat, until browned.

Stir in tomato sauce and cook for 3 minutes to allow flavors to meld.

Lightly grease a round 8-inch baking dish with butter.

Spread the softened cream cheese evenly on the bottom of the prepared dish.

Spoon the meat mixture over the cream cheese layer, then top with shredded mozzarella cheese and shredded sharp cheddar cheese.

Bake for 15 minutes, or until the dip is hot and bubbly, and the cheese is melted and slightly golden.

Serve warm with crackers or crusty bread.