-vegatables, cut in -bite-size Pieces In a medium saucepan combine until smooth: milk, apple juice, flour, mustard, onion powder, salt and black pepper. Cook and stir over medium heat until mixture thickens and boils; cook and stir one minute longer. Remove from heat; add cheese; stir until melted. Transfer to a fondue pot; keep warm. Serve with bread cubes and assorted vegetables. This makes 4 portions (about 2 cups).