Swiss Omelet Roll-Up Recipe

In a small saucepan, combine 1/2 cup mayonnaise and flour. In a small bowl, whisk egg yolks until thickened; add milk. Pour into mayonnaise mixture; cook over low heat, stirring constantly, until thickened. Add salt and pepper. Remove from the heat; cool for 15 minutes. In a large bowl, beat egg whites until stiff. Fold into the mayonnaise mixture. Line a 15-in. x 10-in. x 1-in. baking pan with waxed paper; coat paper with cooking spray. Pour egg mixture into pan. Bake at 425 ° for 20 minutes. Meanwhile, in a small saucepan over low heat, combine 2 tablespoon onions, mustard and remaining mayonnaise. Set aside 3/4 cup for topping; set aside and keep warm. To the remaining sauce, add ham, cheese and remaining onions; cook over low heat until cheese begins to melt. Remove omelet from oven; turn onto a linen towel. Peel off waxed paper. Spread cheese sauce over warm omelet. Roll up from a short side. Top with reserved mustard sauce. Garnish with oregano or parsley if desired. Serve immediately.