Place pizza stone (or upside-down baking pan) in the the bottom third of the oven and preheat to 450 degrees F.
Prepare pizza dough as directed in recipe or use a premade pizza dough. Roll out on a lightly floured surface and place on a cornmeal dusted pizza paddle or parchment paper.
Top dough with pizza sauce, cheese, tomato, bell peppers, broccoli, and onion. Slide the pizza off the paddle (or if using parchment paper just slide pizza with the parchment paper) onto the pizza stone or upside down pan. Bake fore 10-12 minutes or until crust is done and cheese is melted.
Remove pizza from the oven and let it cool for 5 minutes. Top with crushed red pepper flakes and slice.