Hot Chopped Ham and Swiss Sandwiches

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Howell Estate in Canton, Texas in 1981.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 pound thinly sliced cooked ham
 * 8 ounces Swiss cheese cut into small cubes
 * ½ cup butter softened
 * ¼ cup finely chopped white onion
 * 2 tablespoons poppy seeds
 * 2 teaspoons prepared mustard
 * 10 sandwich buns

Directions

 * 1) Cut ham into ½ inch squares.
 * 2) Combine ham and all remaining ingredients except buns in large bowl then spoon into buns.
 * 3) Wrap each in foil.
 * 4) Preheat oven to 325°F then bake sandwiches for 25 minutes.
 * 5) Serve hot.