Instructions: Spray medium saucepan with cooking spray; heat over medium heat until hot.

Saute onion and bell pepper until tender, about 5 minutes. Stir in beans, tomato sauce, and mint; cook over medium heat until hot, about 5 minutes.

Spoon half the pasta into a 13x9-inch baking pan. Spoon sauce over evenly; sprinkle with 1/4 cup Parmesan cheese. Spoon remaining macaroni on top.

Heat milk and margarine in a small saucepan over medium heat until hot, but not boiling. Beat eggs in a medium bowl; whisk hot milk into eggs. Pour milk mixture over casserole; sprinkle with remaining cheese and nutmeg.

Bake at 350 until topping is set and browned, 50 to 60 minutes. Let stand 5 minutes before cutting.

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