Italian Beef Burgers | Red Meat Recipes | Weber ID

Ingredients

• 120 milliliters mayonnaise
• finely chopped fresh basil leaves
• garlic clove, pushed through a press
• Freshly ground black pepper
• Extra-virgin olive oil
• 680 grams yellow onions, thinly sliced
• good-quality balsamic vinegar
• Kosher salt
• 680 grams ground chuck (80% lean)
• ciabatta rolls, split
• slices provolone cheese
• thin slices prosciutto
• extra-large tomato, preferably heirloom, cut into 4 thick slices
• 115 grams baby arugula, about 115 grams packed leaves