Make an indentation in the center of each biscuit; sprinkle with oregano. Cut the mozzarella into 10 cubes, 3/4 in. each; place a cube in the center of each biscuit. Pinch dough tightly around cheese to seal. Place seam side down on an ungreased baking sheet.
Spread pizza sauce over tops. Bake at 375° for 10-12 minutes or until golden brown. Serve warm. Refrigerate leftovers.