Baked Macaroni and Cheese

Name: Baked Macaroni and Cheese
Ingredients: 1 pound of gluten free elbow macaroni Note: I like to use either the Schars or Bonavita which are both made from corn and stay firm when cooked.; 4 cups of shredded cheddar cheese alternative Note: I like to use either the Daiya or Veggie brands.; 3 tablespoons all purpose gluten free flour; 2 teaspoons Dijon mustard; 2 cups non dairy milk; 1 1/2 tablespoons Earth Balance ( butter alternative; gluten, soy and dairy free); salt and pepper to taste