2 1/2-3 lb. beef round roast
1 can cream of mushroom soup, undiluted
1 env. onion soup mix
Oven cooking bag

Puncture meat with fork on all sides. Spread about 1/3 cream soup in bottom of cooking bag. Place roast on top of soup. Sprinkle onion soup mix evenly over meat. Cover with remaining undiluted cream soup. Gather end of bag together and tie loosely with plastic strip. Place in casserole dish and microwave.