01 -
Heat up your pan with olive oil and sauté those onions, garlic, and peppers until they get nice and caramelized, about 8-10 minutes.
02 -
In the same pan, cook your thinly sliced steak with salt and pepper until browned. Mix it with the veggies and set aside.
03 -
Roll out your pizza dough on a lightly floured surface into a big rectangle, about 12x16 inches.
04 -
Spread your steak and veggie mixture over the dough, leaving a little border. Top with lots of mozzarella, then roll it up like a jelly roll, tucking in the ends.
05 -
Put your stromboli on a lined baking sheet, brush with egg wash, and bake at 375°F for 20-25 minutes until it's beautifully golden brown.
06 -
Let it cool for a few minutes before slicing - this helps keep all the good stuff inside!