Step 1

Preheat the oven to 400°.

Step 2

Aioli: Combine all ingredients into a bowl and mix. Cool until ready to serve.

Step 3

Sandwich: Add 1 tablespoon of butter to a large frying pan over medium-low heat and cook the onions until well browned, about 20 minutes. Set aside.

Step 4

Add 2 tablespoons of butter to a large frying pan and cook the peppers mushrooms over medium-low heat until browned, about 10 minutes. Set aside.

Step 5

Season the ribeye steaks well with salt and pepper and cook on a hot grill or in a grill pan with a 2 tablespoons of olive oil until grill marks have formed and the desired internal temperature is achieved.

Step 6

Divide the cooked sliced ribeyes between the 4 sliced hoagie buns and layer on each 2 slices of mozzarella cheese, 1 slice of provolone cheese, roasted onions, peppers and mushrooms.

Step 7

Add the sandwiches to the oven and cook for 5 minutes or until cheese is melted and bun is lightly toasted.

Step 8

Serve the hot sandwiches along with the aioli.