Slice sausage crosswise into thin slices. Place in skillet with oil and saute, turning once, about 3 minutes. Remove from pan. Add onion and pepper strips to pan and saute 10 minutes over medium heat until tender. Spread pasta sauce on pizza crust.
Sprinkle with half the cheese. Top with sausage and onion mixture. Sprinkle with remaining cheese and oregano. Bake in pre-heated 425 degrees oven for about 20 minutes, until cheese is melted and crust is golden.
***Use pizza-style bread round. If not available, use frozen cheese pizza, and reduce shredded cheese in recipe to l cup, sprinkling only on top. You may also use pop-open cans (13.8 ounce size) of pizza crust. Shape dough to 11 x 13-inch rectangle, prebake as directed on can then top and bake at 400 degrees for about 20 minutes.