Spoiler alert: not pizza. A pasta dish.
From a box sold in Adams, Minnesota, with ephemera from Ohio.
Crock Pot Pizza
2 (15-1/2 oz.) jars pizza sauce
1 (4 oz.) can mushrooms, drained
1 to 1-1/2 lb. ground beef (hamburger)
1 small onion
1 (4 oz.) pkg. pepperoni, cut in halves
1 (12 oz.) pkg. pizza cheese
3/4 lb. rotini
Brown hamburger and onion. Add pizza sauce, pepperoni, and mushrooms.
Cook and stir 20 minutes. Meanwhile, cook rotini according to directions on package.
Layer first sauce; then rotini; then cheese.
Crock pot: low for 4 hours or high for 1 hour, or
Long metal pan; bake at 350 deg. for 30 minutes.