Perfect Steak Sandwich

Directions

1. Evenly season both sides of the steaks with Garlic Butter Steak and set aside to marinate at room temperature while you prepare the onions.

2. Melt the butter in a medium skillet and add the onions. Toss to coat, cover the skillet and cook over low heat for 20 minutes, tossing the onions a couple times during the cooking.

3. Remove the lid from the skillet and continue to cook for another 20 minutes, tossing occasionally. Add the sugar, vinegar, and salt and pepper and toss to combine. Continue to cook, stirring occasionally, an additional 10 minutes, or until the onions are dark and jammy.

4. While the onions finish cooking, combine the mayo and Creole mustard in a small bowl.

5. Heat a cast iron skillet over high heat. When the skillet is very hot, drizzle with oil and add the steaks. Cook for 5 minutes, and then flip the steaks. Cook for an additional 4-5 minutes and then turn off the heat.

6. Slide the skillet off the heat and allow the meat to rest for 10 minutes. Transfer the steak to a carving board and slice the steaks.

7. Lightly toast ciabatta rolls. Spread the mayo mixture over the bottom half of each roll, and then top each with half of the onion mixture. Top with greens and the top roll and gently press the halves together. Slice in half and serve.