Roast Beef & Caramelized Onion Panini with Avo Horseradish Sauce

Sandwiches, Burgers & Wraps

Roast Beef & Caramelized Onion Panini with Avo Horseradish Sauce

If you are singing the roast beef blues, try adding caramelized onions, Swiss cheese and an avocado horseradish sauce to get your tastebuds doing the tasty dance!


  • 1 ea. Avocado From Mexico, halved, pitted, and skin removed
  • 2/3 c. prepared horseradish
  • 1 t. white wine vinegar
  • 1/8 t. kosher salt
  • 8 ea. slices rye bread
  • 1-1/2 lb. thick-sliced roast beef
  • 2 c. caramelized onions
  • 8 ea. thick slices Swiss cheese
  • 4 T. melted butter


  1. Prepare sauce: in a medium bowl, mash the avocado into a chunky paste. Stir in horseradish, white wine vinegar, and salt and mix until well combined and smooth.
  2. Warm a griddle over medium heat.
  3. Assemble sandwiches: on one slice of rye bread, spread 3 T. avocado horseradish, top with 1/2 lb. roast beef, 1/2 c. caramelized onions, and 2 slices Swiss cheese. Top with another piece of rye.
  4. Brush outsides of each sandwich with 1 T. melted butter and place on hot griddle. Grill and press down for 3 to 4 minutes until golden brown, then flip and repeat until both sides are well toasted and cheese is melted.
  5. Slice sandwiches in half and serve with any remaining avocado horseradish sauce for dipping.


Did you know the avocado is a fruit, not a vegetable? Learn more about the amazing avocado, including its rich history, cultural impact and tasty ways to eat this delicious superfood in guacamole as well as other dishes!

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