Activate the Yeast:

In a small bowl, combine the warm water, yeast, and sugar. Let it sit for 5-10 minutes until it becomes frothy.

Make the Dough:

In a large mixing bowl, combine the flour and salt. Gradually add the yeast mixture and olive oil, mixing until a dough forms. Knead the dough for about 8-10 minutes until smooth. Place the dough in a lightly oiled bowl, cover with a clean towel, and let it rise in a warm place for 1 hour or until it doubles in size.

Prepare the Filling:

In a large bowl, mix together the pepperoni, ham or sausage, mozzarella cheese, Parmesan cheese, olives (if using), bell peppers (if using), Italian seasoning, and red pepper flakes (if using).

Roll Out the Dough:

Preheat your oven to 375°F (190°C). On a floured surface, roll out the dough into a large rectangle (about 12x16 inches).

Assemble the Stromboli:

Evenly spread the filling mixture over the rolled-out dough, leaving a small border around the edges. Carefully roll the dough tightly from one long side to the other, forming a log. Pinch the seams together to seal.

Brush with Egg Wash:

Place the stromboli seam-side down on a baking sheet lined with parchment paper. Brush the entire surface with the beaten egg mixed with water for a golden finish.

Bake:

Bake the stromboli for 25-30 minutes, or until golden brown. Let it cool slightly before slicing.

Serve:

Serve the stromboli warm with marinara sauce on the side for dipping.

This Homemade Stromboli is packed with delicious flavors and crispy on the outside, making it a hit at any gathering or weeknight meal!