Instructions:

1. Preheat the Oven:
   Set the oven to 425°F (220°C). Line a baking sheet with parchment paper for easy cleanup.
2. Cook the Beef:
   In a skillet, brown the ground beef along with the chopped onion over medium heat. Drain off any excess fat once cooked.
3. Mix the Ingredients:
   Stir in ketchup, mustard, salt, and pepper. Allow the mixture to cool slightly.
4. Assemble the Bites:
   Roll out the pizza dough and cut it into 12 squares. Spoon a small amount of the beef mixture and shredded cheddar cheese into the center of each square. Fold and pinch the dough to form small balls.
5. Baking Soda Bath:
   Boil 4 cups of water and slowly add the baking soda. Dip each dough ball into the boiling water for 30 seconds, then transfer to the prepared baking sheet.
6. Bake:
   Brush each ball with beaten egg, sprinkle with pretzel salt or coarse sea salt, and bake for 12-15 minutes or until golden brown.