01 -
Preheat oven to 425°F. Line a sheet pan with parchment paper or a Silpat liner.
02 -
In a skillet, heat olive oil and sauté thinly sliced onion and green bell pepper. Season with 1 teaspoon dried Italian seasoning, garlic salt, and black pepper to taste. Cook until softened, about 3-5 minutes.
03 -
Press pizza dough into a 12 by 16-inch rectangle on a clean surface. Evenly sprinkle half of the shredded mozzarella cheese over the dough.
04 -
Distribute chopped grilled sirloin evenly over the cheese layer, then add the sautéed onion and bell pepper mixture.
05 -
Drizzle ⅓ cup Parmesan-Peppercorn salad dressing over the filling, then top with the remaining shredded mozzarella cheese.
06 -
Starting at the widest edge, roll the dough tightly over the filling, finishing with the seam side down on the prepared sheet pan.
07 -
Brush the entire surface with melted butter. Sprinkle with ½ teaspoon dried Italian seasoning, additional garlic salt as desired, and 2 tablespoons grated Parmesan cheese.
08 -
Bake stromboli for 18 to 20 minutes or until golden brown. Let rest for 5 minutes before slicing to serve.