
In a medium skillet, heat 1 tablespoon of olive oil over medium-high heat. Add chopped onion and cook, stirring, about 2 minutes, until onions start to soften.
Add ground beef and cook, breaking up until cooked through. Drain off any excess fat and add taco seasoning and tomato sauce. Cook together about 3 minutes, then remove from heat and set aside.
Preheat oven to 450° F. Place pizza shell on a baking sheet and brush all over with remaining 1 tablespoon of olive oil. Spread Isadora's Original refried beans over pizza shell, leaving ½” border at the edge. Top with half of ground beef mixture and then with grated cheddar cheese.
Place pizza in oven and reduce heat to 425°F. Bake for 9-12 minutes.
(Note: Taco meat mixture is enough for 2 pizzas.)