Preheat oven to 350. Bring 2 quarts of water to boil in large stock pot. Add 1 tablespoon oil to prevent sticking. Add pasta and stir to separate. Cook pasta until just tender. Pour 1 jar of sauce in bowl. Add garlic and mix thoroughly. Pour half of mixture into bottom of large baking dish (use a dish with a glass cover)
Drain pasta. Pour back into pot. Add sauce from bowl and enough of second jar to make mixture sloppy. Pour into baking dish. Sprinkle with oregano and cheese. Cover and bake for 30 minutes.