Here’s a promo recipe card (paper) distributed by General Mills, Inc. published sometime between the 1980’s through 1990’s (I believe). The recipe is typed below along with a scanned copy–click to view larger copy.

Impossible Pizza Pie

The pie that does the impossible by making its own crust.

2/3 cup chopped onion
1/3 cup grated Parmesan cheese
1 1/2 cups milk
3 eggs
3/4 cup Bisquick baking mix
Sauce (below)
1/4 cup grated Parmesan cheese
1 package (3 1/2 ounces) sliced pepperoni
1/3 cup chopped onion
1/2 cup chopped green pepper
1 to 1 1/2 cups shredded mozzarella cheese

Heat oven to 425°. Grease pie plate, 10×1 1/2 inches. Sprinkle 2/3 cup onion and 1/3 cup Parmesan cheese in plate. Beat milk, eggs and baking mix until smooth, 15 seconds in blender on high or 1 minute with hand beater. Pour into plate. Bake 20 minutes. Spread Sauce over top. Top with remaining ingredients. Bake until cheese is light brown, 15 to 20 minutes. Cool 5 minutes. 6 to 8 servings.

Sauce: Mix 1 can (6 ounces) tomato paste, 1/4 cup water, 1 teaspoon dried oregano leaves, 1/2 teaspoon garlic salt, 1/2 teaspoon dried basil leaves and 1/4 teaspoon pepper.

High Altitude Directions (3500 to 6500 feet): No adjustments are necessary.

Update: Here’s a newspaper clipping for the same recipe (date unknown):