Meanwhile, in 3-quart saucepan, melt 1/4 cup butter over medium-high heat. Cook garlic in butter, stirring frequently, until golden. Reduce heat to medium. Stir in flour, salt, mustard and red pepper. Cook and stir until mixture is smooth and bubbly. Gradually add milk, stirring constantly, until mixture boils and thickens, about 5 minutes. Gently stir in ham, tomatoes and cooked macaroni.