Cheaters' stromboli

Ok, so I say "cheaters" stromboli because I didn't make the dough. I used Pillsbury Crescent Dough. That stuff is amazing!And I'm not even getting paid to say that (hint, hint, Pillsbury!). They now make this product that is a seamless sheet of dough for things like this stromboli, so now you don't have to press several triangles together to get a nice big piece. Anyway, the dough is light and flaky, which I like but you could easily use pizza dough for this too if you want. You'd have to cook it a bit longer though.

Ingredients:

1 crescent roll sheet, cut in thirds
1/4 a small onion, sliced
1 garlic clove, minced
1 tablespoon olive oil
4-5 mushrooms, sliced
5-6 florets broccoli
1 cup spinach, cut in ribbons
1/2 cup shredded mozzarella
1 tablespoon parmesan cheese
dash of garlic powder
dash crushed red pepper flakes
salt
pepper
1 egg mixed with 1 tablespoon water
tomato sauce for dipping

Directions:

Preheat oven to 375. Place broccoli in a pot with water and boil until it is tender, drain and set aside. In a large sautee pan, cook onions and garlic in oil over medium-low heat for a few minutes, or until onions become soft. Add mushrooms and do not stir pan - just leave them. Cook about 2-3 minutes and then stir the mushrooms. Cut broccoli into small pieces and add to pan. Cook until mushrooms are soft and brown. Add spinach to pan and cook until it turns soft, adding a splash or two of water when it looks like it is drying out. Season with garlic powder, crushed red pepper, salt, and pepper. On a pan lined with aluminum foil, unroll your dough sheet. Cut off 1/3 of dough and set the rest aside. On the 1/3 in front of you pile a small amount of cheese about an inch from one of the long sides and make a line down the dough. Top this with your cooked veggies. Top with more cheese and the parmesan. Carefully roll the dough around the cheese and veggies and press to seal, making sure to seal up the ends as well. Cut a few slits in the dough. In a small bowl, mix egg and water together and whisk. Brush top of dough with this egg mixture. Transfer to over and bake for about 15-18 minutes or until the dough is fully browned. Cut and serve with tomato sauce for dipping.