Yeah, it makes sense to just put the pizza in right away. I hate to pre-heat. It's a waste of electricity too. I never thought to lower the temperature for the oven. It's true that the lower the temperature, the less it cooks. Good idea to try.
Pinky, yeah, I'll have to try it without pepper. When we made it at school, it taste delicious even with the little pepper it had. I was desperate to make a pizza, so I used a measurement that I thought would be about close to the pizza ingredients, but it was too much pepper lol.