Beef - With pasta

2 tablespoons vegetable oil 1 1/2 pounds beef stew meat, cut into 1/2 inch pieces 1/2 pound bacon, cut into 1/4 inch pieces 1/2 onion, diced 3 strips celery,[...]

12 ounces jumbo pasta shells 1 1/2 pounds thinly sliced deli roast beef 4 (10.25 ounce) cans beef gravy 1 (10 ounce) bottle cream-style horseradish sauce 8[...]