Cute Halloween Marsh-Monsters

Ingredients

20 squares saltine type crackers unsalted tops

2 tablespoons onion

1 pound lean ground beef

1 large egg

2 tablespoons 1 percent low fat milk

1/4 teaspoon black pepper

1/3 cup catsup

1 tablespoon brown sugar

1/2 teaspoon apple cider vinegar

1 teaspoon water