|Ground beef||1⁄2 Pound|
|Chopped onion||1⁄2 Cup (8 tbs)|
|Bread dough||32 Ounce, divided (1 Package Frozen, Thawed)|
|Prepared mustard||2 Tablespoon, divided|
|American cheese slice||3⁄4 Ounce, divided (12 Slice)|
|Shredded mozzarella cheese||8 Ounce, divided (2 Cups)|
|Sliced pepperoni||3 1⁄2 Ounce, divided (2 Package)|
|Dried italian seasoning||2 Teaspoon, divided|
|Vegetable oil||1 Teaspoon (For Brushing)|
Brown ground beef and onion in a large skillet, stirring until meat crumbles.
Drain well, and set aside.
For each stromboli, place 1 loaf bread dough on a lightly floured surface; roll dough into a 12-inch square.
Spread 1 tablespoon mustard over dough to within 1/2 inch of edges.
Layer 3 slices American cheese, 1/2 cup mozzarella cheese, half of pepperoni, and half of beef mixture lengthwise down center third of dough, leaving a 1/2-inch border at top and bottom of dough; sprinkle with 1 teaspoon Italian seasoning.
Top with 1/2 cup mozzarella cheese and 3 slices American cheese.
Fold each side of dough over filling; pinch seam and ends to seal.
Transfer loaves to greased baking sheets; brush loaves with oil.
Bake at 350° for 25 minutes or until lightly browned.
Cut each loaf into 8 slices.