Caramelized Onion and Pepper Steak Sandwich

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December 19, 2019

finished Caramelized Onion and Pepper Steak SandwichLately, I've been having guests over in the afternoons so I've been trying to make fancier lunch fare. I made these steak sandwiches to try and impress, and they did just the job. I was able to make 4 of these filling and super yummy steak sandwiches for about $10 total. Win-win!


Prep Time: 7 minutes

Cook Time: 23 minutes

Total Time: 30 minutes

Yield: 4 sandwiches


  • 1 steak (about .75 lb)
  • salt and pepper
  • 2 tsp oil
  • 1 Tbsp butter
  • 2 cloves garlic, sliced
  • 2 rosemary stems
  • 1 onion, thinly sliced
  • 1 bell pepper, thinly sliced
  • 1 large French bread loaf
  • 4 slices cheese
  • condiments of your choice (mustard, mayonnaise, horseradish)
  • 2 tsp balsamic vinegar
  • 2 Tbsp sliced pepperoncini peppers


  1. Bring steak to room temperature and season with salt and pepper.
  2. Steak in pan
  3. Heat 2 teaspoons of oil to a pan over high heat and add the steak to the pan. Cook for a few minutes.
  4. steak in pan

  5. Flip steak over and add 1/2 tablespoon of butter and garlic to pan.
  6. adding butter & garlic to the pan
  7. Tuck garlic slices under steak and finish cooking to desired doneness.
  8. sizzling juices around garlic & steak
  9. Add rosemary stems to pan, allow to sizzle for about 15 seconds, then shut off heat. Transfer steak, garlic, and rosemary stems to a plate and loosely tent with foil. Leave juices in pan.
  10. sizzling juices
  11. Add the remaining 1/2 tablespoon of butter to the pan with the juices. Add onions and peppers to pan and cook on high heat until edges are browned, stirring occasionally, then reduce to medium low heat. While these are caramelizing, we will work on the bread.
  12. adding Onion and Pepper to pan

  13. Cut French loaf into quarters, then slice in half horizontally. Add a slice of cheese on half the slices. You can smear some butter on the other 4 if you like.
  14. cheese on bread
  15. Place under broiler for a couple minutes for cheese to melt and bread to slightly toast. I used my toaster oven. Add mustard, mayonnaise, and horseradish to non-cheese side.
  16. spreading mustard on bread
  17. After about 10-15 minutes, add 2 teaspoons of balsamic vinegar to caramelized onions and peppers. Stir well. Shut off heat.
  18. Caramelized Onion and Pepper

  19. Slice steak into thin strips. Place on cheesy side of bread, top with onions and peppers, then add pepperoncini. Pop the other slice of bread on top, then decorate with fried rosemary stem.
  20. Caramelized Onion and Pepper Steak Sandwich
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