Thanks for posting.
Another variation that's pretty easy is Pizza Bubbles casserole - or Bubble Up pizza, which I think was a Weight Watcher's version of the recipe (lower fat ingredients.) Recipes available by googling.
It involves using canned biscuits cut into fourths (I get the cheap store label), sauce (I just use spaghetti sauce in a jar), shredded mozzarella and whatever other toppings you like. I sometimes brown and drain ground beef and add some chopped green pepper and onions to the sauce. Also good with pepperoni.
To jazz it up a little, I add a heaping teaspoon of jar pesto to the sauce, a few grindings of Italian seasoning, and sprinkle red pepper flakes on top.