Meatball and Mushroom Hoagies | Savory

Ingredients

• 1 lb ground beef, 90% lean
• 1 tbsp minced garlic
• 1/3 cup bread crumbs
• 1/4 cup grated Parmesan cheese
• 1 large egg
• 1 tbsp butter
• 1 (8 oz) pkg Nature's Promise Organic sliced mushrooms
• 4 hoagie rolls
• 1 tbsp olive oil
• 8 slices provolone
• 3 cups arugula
• 1 tbsp balsamic vinegar