Cook macaroni according to package directions; drain. In a 2-quart casserole combine macaroni, broccoli, ham, and green or red pepper; set aside.
For sauce, in a small saucepan stir together milk, cornstarch, and pepper. Cook and stir until thickened and bubbly. Add cheese; stir until melted. Stir sauce into mixture in casserole. Combine bread crumbs and margarine; sprinkle atop mixture in casserole.
Bake, uncovered, in a 350 degree F oven for 30 minutes or until bubbly and bread crumbs are lightly browned.
Microwave directions: Prepare as above, except use a microwave-safe casserole and do not sprinkle bread crumbs over macaroni mixture before cooking. Micro-cook macaroni mixture, covered, on 100-percent power (high) for 5 to 8 minutes or until hot, stirring once. Top with bread crumb mixture. Cook, uncovered, on high 1 minute more. Makes 4 servings.
