Ingredients:
- 1 lb ground beef
- 1/4 lb mortadella, chopped
- 2 Tbsp Italian parsley, chopped
- 1/4 cup chopped yellow onion
- 2 cloves garlic, minced
- 1/2 tsp salt
- 1/4 tsp ground black pepper
- 1/4 cup grated Parmesan cheese
- 4 slices provolone cheese
- Marinara sauce, heated
- 4 hamburger buns
- Unsalted butter
- Garlic salt
Directions:
1. In a large bowl mix together the first 8 ingredients. Form into 4 patties.
2. Preheat grill to medium-high. Preheat broiler.
3. Lightly butter the insides of all the hamburger buns. Lightly sprinkle with garlic salt. Place on a sheet pan.
4. Grill patties 4-5 minutes per side. Remove from heat and top with provolone slices.
5. Place buns under broiler for 2 minutes.
6. Place patties on toasted buns and top with 1-2 tablespoons of marinara.
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