Steak Sandwich

This is my all time favorite sandwich.  It is quick and the whole family will love it and great to serve guests.

You can never turn down sweet sauteed onions over steak?

• 2 Spanish or Sweet onions, sliced thinly
• Dash of salt
• 5  tablespoons of butter (separated)
• 2 pounds of boneless rib steak, sliced thinly
• 2 tablespoons olive oil
• Salt and Pepper to taste
• 1 Teaspoon Garlic Seasoning
• 1 Teaspoon Steak Seasoning
• 2 cups mozzarella cheese
• 4 Hoagie buns, split

Preheat your oven to 400 degrees F. Line a rimmed cookie sheet with parchment. Set aside.
Start your onions first. They will take longer than the steak. Heat 3 Tablespoons Butter until it melts, add the onions. Add a hit of salt to speed up the sweating process, and keep stirring every now and again, but not constantly. You can lower to a medium low setting if they are starting to cook too quickly. Slower is better with onions, so don't rush the process. Once the moisture is out hit them with the butter and continue cooking until they caramelize. The process should take about 15 minutes on a nice medium heat, or up to 25/30 on a lower heat. Transfer to a plate and set aside till needed.

Slice the meat as thinly as you can. It's helpful to have the meat cold during the cutting process if you're not adept with your knife skills. So you can pop it in the freezer for 15 or 20 minutes before cutting it if you like. Let the steak get to room temp before cooking.

Mix 2 Tablespoons of butter, garlic and steak seasoning together and add to a pan and melt.  Add the beef and cook while stirring it about occasionally. You can cook it to your taste. I'd recommend 3 to 5 for a medium rare, and 5 to 8 minutes for well done, which is how we like ours.
Add some salt and pepper to taste.

Butter your hoagie buns and toast them slightly on the inside by placing them on a hot skillet. Only takes about 2 minutes. Now place them cut side up on the cookie sheet.  Place on meat, onions and cheese.  Place back into oven until cheese is melted.