Cheesy Baked Roast Beef Sliders with Caramelized Onions by scarlatifamilykitchen - FoodSocial

Ingredients

• .667 cup Mayonnaise
• 1 Tbsp Parmesan Cheese
• .25 tsp Garlic Powder
• .5 tsp Black Pepper
• .25 tsp Kosher Salt
• 1 whole Yellow Onion
• 2 Tbsp Butter, Salted
• 1 Tbsp Red Wine Vinegar
• .5 tsp Kosher Salt
• .25 tsp Black Pepper
• 24 pieces Hawaiian Rolls
• 1 lb Deli Roast Beef
• 10 pieces Provolone Cheese
• .5 cup Butter, Salted
• 1 Tbsp Granulated Onion
• 1 tsp Garlic Powder