Place a pizza stone, pizza pan, or large baking sheet on the middle rack of your oven and preheat to 550 degrees F (or as high as your oven will go).
Place a large piece of parchment paper on your counter, and sprinkle with a little semolina.
Place the pizza dough on the parchment paper and use your fingers to shape it into a large 12-14 inch circle (or into whatever shape and size your pan is). You could roll it out too, but I find it simpler to shape it with my hands. If the dough is very elastic and springs back, just let it rest for a couple of minutes and stretch again until it gets to the right size.
Spread the marinara sauce onto the pizza dough, leaving a 1 inch border
Spread half of the veggies evenly over the sauce. Sprinkle with 3/4 of the cheese. Add the rest of the veggies, and the rest of the cheese.
Transfer the pizza to the pizza stone or pan in the oven. If you have a pizza peel, great! Otherwise, this can be a bit tricky, but I find it easiest to slide the pizza (with the parchment) onto the back of a large (13" x 18") baking sheet. Then I open the oven, pull the middle rack out a bit, and carefully slide the pizza onto the pizza stone.
Bake for about 8-10 minutes. It may take more or less time, depending on how hot your oven gets, so keep a close eye on it.
Remove the pizza from the oven and let cool for about 5 minutes before slicing. Cut into 8 slices with a pizza wheel or knife.
Pizza Dough
In the bowl of a stand mixer fitted with the dough hook, combine all-purpose flour, bread flour, semolina, water, yeast, sugar and salt.
knead for about 5 minutes until dough comes together in a smooth ball. (You can knead the dough by hand too).
Drizzle some olive oil inside the bowl, and spread it around with the ball of dough until dough and sides of the bowl are well-coated. Place a tea towel over the bowl and let rise in a warm place for 45-60 minutes, until doubled in size.
(When our kitchen is particularly cold, I like to turn the oven on for a couple of minutes, then turn it off so that the inside temperature is like a hot summer day, and let the dough rise in there.)