Step 1: Make the Dough

1. In a large bowl, combine warm water, sugar, and yeast. Let sit for 5 minutes until foamy.
2. Add olive oil, flour, and salt. Mix until a dough forms.
3. Knead on a floured surface for 8 minutes until smooth.
4. Place dough in a greased bowl, cover, and let rise for 1 hour.

Step 2: Prepare the Filling

1. Slice the pepperoni or salami.
2. Grate the mozzarella cheese.
3. Mix Italian seasoning, garlic powder, and Parmesan cheese in a small bowl.

Step 3: Roll & Assemble

1. Preheat oven to 400°F (200°C).
2. Roll out dough into a 10×14-inch rectangle.
3. Spread a thin layer of marinara sauce, leaving a 1-inch border.
4. Layer cheese, meat, and seasoning mix evenly over the dough.

Step 4: Roll & Seal

1. Roll the dough from the long side, tucking edges as you go.
2. Seal the edges by pinching and pressing firmly.
3. Place seam-side down on a parchment-lined baking sheet.

Step 5: Egg Wash & Bake

1. Beat the egg and brush it over the top of the Stromboli.
2. Make 3-4 small slits on top for ventilation.
3. Bake for 20-25 minutes until golden brown.

Step 6: Cool & Serve

1. Let Stromboli cool for 5 minutes before slicing.
2. Serve with marinara sauce for dipping.