Try this homemade Super Delicious O'Brien'S Sandwich recipe the whole family will love. Made with bread, horseradish, beef and mayonnaise. Easy step-by-…
This Super Delicious O'Brien'S Sandwich relies on simple, everyday ingredients such as horseradish, roast beef, thinly sliced, mayonnaise and swiss cheese. It comes together quickly and makes 4 servings, at about 813 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026