Place the dough circles on the work surface. Spread each circle with 1 tablespoon pizza sauce to within 1/4-inch of the edge. Place 1/4 cup of the mozzarella cheese near the center of each circle. Top each with 1 tablespoon ricotta cheese and sprinkle with 1/4 teaspoon oregano.
Preheat oven to 425 degrees.
Allow to cool for a few minutes before eating.