Lasagna Dip... Lasagna Dip   Ingredients 2 tablespoons olive oil 1 yellow onion, thinly sliced 2 garlic cloves, minced 1/2 cup cremini mushrooms, cleaned and sliced 1/2 pound ground beef 1 cup tomato sauce or spaghetti sauce salt and pepper to taste 1 teaspoon dried oregano 1/2 teaspoon freeze dried basil butter for baking dish