Southern Stacked Burger - Martin's Famous Potato Rolls and Bread

Ingredients

• 4 Slices of Thick-Cut Bacon
• 2 Medium Red Onions, thinly sliced
• 2 Tablespoons Extra-Virgin Olive Oil
• Salt, to taste
• Freshly Ground Pepper, to taste
• 2 Pounds Mixed Ground Chuck, Ground Brisket, and Ground Short Rib
• 4 Martin’s Big Marty’s Rolls
• 4 Leaves Lettuce, for serving
• 1 Cup Queso Dip (Salsa con Queso), warmed
• 2 Medium Green Tomatoes, sliced into 1/2-inch-thick rounds
• 1 Large Egg, Beaten
• 1/2 Cup Buttermilk
• 1/2 Cup All-Purpose Flour, divided
• 1/2 Cup Cornmeal
• 1 Teaspoon Salt
• 1/2 Teaspoon Black Pepper
• 1 Pinch Ground Cayenne
• Canola Oil, for frying