Prep time: 15 minutes

Cook time: 20-25 minutes

Materials:

• 3 sub rolls opened
• 6 tbs butter (salted or unsalted are fine)
• 2 large onions cut into quarters
• 8 oz white mushrooms chopped
• 1 cup shredded mozzarella cheese
• 2 tbs vegetable oil
• Salt and pepper to taste
• Ketchup (optional)

Process:

1. Preheat the oven to 400 degrees.

2. In a medium sized skillet over medium high heat add in the vegetable oil and onions. Cook 3-4 minutes stirring occasionally until onions become translucent and cooked through.

3. Add in the mushrooms and cook for an additional 3-4 minutes stirring occasionally.

4. Season with salt and pepper and cook for an additional minute. Remove from heat and set aside.

5. Place your rolls face side up on a flat surface. Spread one tbs of butter on each piece of bread. Top with onion and mushroom mixture, and then top it off with some mozzarella cheese.

6. Place on a baking sheet and bake 15-20 minutes or until the cheese becomes golden and melted.

7. Remove from the oven and top with ketchup (optional).

8. Plate and ENJOY!

https://m.youtube.com/watch?v=GcjCjHA0KAk