One that is really simple(if you don’t like to make your own crust from scratch) is made with biscuits.
For a 9 x 13 pan I use 2 cans of cheap(whap) biscuits. Spray the pan or grease lightly. Spread the biscuits out and then flatten them so they cover the entire bottom of the pan.
Next use about a cup of pasta sauce or pizza sauce to cover the crust. Then add leftovers or your favorite toppings. I know the left overs might sound kind of funky but you would be surprised what kids will eat when it is disguised as pizza. I’ve even added cauliflower and broccoli to the mix.
Add about 1 cup of your favorite cheese on top. Bake at 350 for 20 to 25 minutes.