2 c. cubed ham
2 tbsp. minced onions
1/4 c. mayonnaise
2 tbsp. sugar
1/2 c. cubed Swiss cheese
1/2 tsp. salt
1 tbsp. vinegar
8 buns or 16 mini-buns

Mix ham, cheese, onion and salt in one bowl. In another bowl, mix mayonnaise, vinegar and sugar. Add this to ham mixture and lightly toss. Split buns and brush with butter. Spread mixture on bottom half of bun, place top on bun and wrap in foil. Bake at 350 degrees for 20 minutes.