Combine flour, sugar, baking powder, and salt; set aside.
Combine egg, milk, and shortening.
Pour egg mixture into dry ingredients; stir only until flour mixture is moistened.
Batter will be lumpy.
Do not overbeat.
Fill greased muffin pans one-third full.
Add 1 teaspoon of jelly.
Top with remaining batter.
Bake at 425° for 20 to 25 minutes.