Steakhouse BBQ Burger - Martin's Famous Potato Rolls and Bread

Ingredients

• 1 Large Yellow Onion
• 1 Tablespoon Unsalted Butter
• 1 Teaspoon Brown Sugar
• 2 1/2 Pounds Ground Beef
• 3 Cloves Garlic, minced
• 2 Teaspoons Smoked Paprika
• 1 Teaspoon Ground Cumin
• 1 Tablespoon Worcestershire Sauce
• 2 Teaspoons Spicy Montreal Steak Seasoning
• 1 (12 ounce) Bottle Dark Beer, divided
• 1/2 Teaspoon Fresh Ground Black Pepper
• 2 Tablespoons Extra Virgin Olive Oil
• Kosher Salt
• 6 Ounces KC-Style Barbecue Sauce (or your favorite)
• 6 Sandwich Potato Rolls
• 6 Slices Cheddar Cheese
• 6 Tablespoons Mayo
• Lettuce