In a screw-top jar shake together milk, flour, salt, pepper, and nutmeg. Pour into a saucepan. Cook and stir over medium heat until bubbly. Cook and stir 1 minute more. Remove from heat; stir in cheese until just melted. Stir in roasted sweet peppers.
Meanwhile, in a 4-quart Dutch oven or large pot cook pasta according to package directions, adding vegetables the last 5 minutes of cooking time; drain. Place pasta mixture on a serving platter; spoon cheese mixture atop. Sprinkle with almonds, if desired. Makes 4 servings.