Remove the casings from the chorizo and crumble it into a large skillet. Cook over medium-high heat, breaking up the clumps until browned, about 8 minutes. Drain on paper towels.

Preheat the oven to 425°F.

Brush the pizza crusts with olive oil. Sprinkle 1 cup of cheese evenly on each crust. Divide the cooked chorizo over the cheese, and top with half the black beans and half the salsa each.

Bake for 7 minutes or until the cheese is melted. As soon as the pizzas come out of the oven, top with ¼ cup of cheese on each pizza. Cut into slices and serve immediately.