put it in a metal tray and wrap foil around it and cook it for about 20 min
Yes. Put it on a grill tray with the grill on max.
Yes, you can put pizza directly on the oven rack when baking it.
buy cookie dough,put cookie dough on a tray, warm up oven to 360 degrease, put tray in oven, and wait for about 15 minutes, then eat
you put them on a tray then put them in oven on 350 for 5 minutes
I put it in 400 degrees
If the tray had traces of oil or other food on it, the hot oven may turn these traces dark and it will appear that the tray has become dirty when actually the heat just made dirt already on the tray become visible.
However much you want. If you like more pepperoni, then put on more pepperoni. If you don't like mushrooms, don't put any on. Just make sure it fits and doesn't fall off your pizza. Maybe to prevent things from falling into your oven, place the pizza on a tray as well as whatever you are cooking it on.
Most frozen pizza boxes state that for a crispier crust, place the pizza directly on the oven rack. Once done, remove the rack from oven and remove pizza from rack. You can spray the rack with Pam to reduce sticking. I've always cooked my pizzas this way.
separate the pieces and put them on an unheated metal tray
Put on the baking sheet turn the oven on and slip it in.Usually the center rack at about 350oF for 25-30 min. There are specialized pizza pans which have a perforated surface that lets the bottom crust get crispier. Don't oil them as the oil drips thru the holes.
Yes, you can do it whenever - I do it all the time!