Cheeseburger Buns

2 packages active dry yeast

1/2 cup warm water (110° to 115°)

3/4 cup warm milk (110° to 115°)

1/4 cup sugar

1/4 cup shortening

1 egg

1 teaspoon salt

3-1/2 to 4 cups all-purpose flour

1-1/2 pounds ground beef

1/4 cup chopped onion

1 can (8 ounces) tomato sauce

8 slices cheese, quartered

In a large bowl, dissolve yeast in warm water. Add the milk, sugar, shortening, egg, salt and 2 cups flour; beat until smooth. Stir in enough remaining flour to form a soft dough. Turn onto a floured surface; knead until smooth and elastic, about 4-6 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 30 minutes. In a large skillet, cook beef and onion over medium heat until meat is no longer pink; drain. Stir in tomato sauce. Remove from the heat; set aside. Punch dough down; divide into 16 pieces. On a lightly floured surface, gently roll out and stretch each piece into a 5-in. circle. Top each circle with two pieces of cheese and about 3 tablespoons beef mixture. Bring dough over filling to center; pinch edges to seal. Place seam side down on a greased baking sheet. Cover and let rise in a warm place until doubled, about 20 minutes. Bake at 400° for 8-12 minutes or until golden brown. Serve warm. Refrigerate leftovers.