01 -
Set oven to 425°F (220°C) and line a baking sheet with parchment paper.
02 -
Divide pizza dough into 14 equal pieces. Roll each into an 8-inch strip for filling.
03 -
Place half a slice of American cheese and one thawed meatball at one end of each strip, then carefully roll dough around filling, pinching seams to seal. Arrange assembled bombs on the prepared baking sheet.
04 -
Bring 5 cups of water to a boil in a medium saucepan. Add baking soda carefully, stirring until dissolved. Return to a gentle boil.
05 -
Working with 3–5 at a time, immerse dough bombs in boiling solution for 20–30 seconds, turning occasionally. Remove with a slotted spoon and drain on a paper towel-lined plate.
06 -
Return boiled bombs to baking sheet. Brush with beaten egg and sprinkle generously with coarse sea salt.
07 -
Bake for 15–20 minutes until the crust is deep golden brown and crisp.
08 -
Serve warm alongside yellow mustard for dipping if desired.