Monte cristo sandwiches

1. Combine mayonnaise and mustard, stirring well; spread on one side of each bread slice.
2. Place one slice each of turkey, ham, and cheese on top of 4 bread slices.
3. Top with remaining bread.
4. Cut each sandwich in half diagonally; secure with wooden picks.
5. beat egg whites until stiff; set aside.
6. Beat eggs; add sour cream and milk, stirring well.
7. Foldi in egg whites.
8. Dip sandwich halves in batter; coat with breadcrumbs.
9. Carefully lower sandwich halves, one at a time, into deep hot oil (375 degrees); fry until golden brown, turning once.
10. Drain; remove wooden picks.
11. Serve sandwiches immediately.
12. Yield: 4 servings.