Dissolve the yeast in the warm water and let sit for 5 minutes.
In a stand mixer, mix the flour, dry milk, sugar, and salt using the whisk attachment on low for 4 minutes.
Add the yeast mixture and vegetable oil to the dough and mix on medium speed for 10 minutes.
Grease a half sheet pan and sprinkle with cornmeal.
Pour the dough into the pan and spread it out to cover the base. Let it sit for 20 minutes.
Bake the dough at 475°F (245°C) for 10 minutes (or 7 minutes if using convection).
In a saucepan, mix the dried onions, garlic powder, pepper, tomato paste, water, and seasonings. Simmer for 10 minutes.
Spread 1 ½ cups of the cheese over the pre-baked crust, then pour the sauce over the cheese and spread it evenly.
Sprinkle the remaining cheese evenly over the top.
Bake the pizza at 475°F (450°F if using convection) until lightly browned on top, about 11 minutes.
