Preheat oven to 300 degrees. In large 2-quart oven-proof casserole dish, mix the stew meat with the cream of tomato soup, cream of celery(or cream of mushroom)soup, a can of milk and the dry onion soup mix together until well blended. Cook the mixture in the oven for 2 hours, checking after 1 hour to make sure it doesn't drip out of the casserole dish. Cook egg noodles according to package directions. You can serve the noodles and beef tips mixed together or each separately. Enjoy!!!