Instructions: Preheat the oven to 375 degrees.

In a large skillet, heat the oil over medium-high heat. Add the ground beef, bell pepper, onion, and mushrooms, and cook for 6 to 8 minutes, stirring to crumble the beef, until no pink remains; drain excess liquid.

Add the remaining ingredients except the cheese; mix well. Place in a 2 1/2-quart casserole dish, cover, and bake for 22 to 25 minutes.

Remove the casserole from the oven, uncover, and top with the mozzarella cheese. Bake uncovered for 5 to 7 minutes, or until heated through and the cheese is melted.

This recipe yields 4 to 6 servings.

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