1Melt 2 tablespoons maragrine in a skillet over medium heat.Add mushrooms;saute until softened,5 minutes.Add
ground beef,steak sauce and basil,saute until beef is cooking through,10 minutes.
2in a large saucepan over medium heat,melt 2 tablespoons margarine.Stir in flour.Add milk and cook,stirring,until sauce bubbles and thickens,8 minutes.Remove from heat.Add dijon mustard and 1 cup shredded swiss cheese;stir until melted.Add beef-mushroom mixture and ham.Season with seasoned pepper.
3Preheat oven to 350 degrees F.Sprayed a 9-x13-inch baking dish with nonstick cooking spray.Add diced new red potatoes and cubed white american cheese,mix well.
4Spread mixture in a prepared baking dish and sprinkle with remaining ham and shredded swiss cheese.Bake until cheese is bubbling,25 to 30 minutes.