Black and Blue Burgers with Vidalia Onions Recipe

Ingredients (13)

• 1 pound (450 grams) ground beef
• 1 Vidalia onion
• 1/3 cup (80 grams) crumbled blue cheese
• 1/4 cup (60 grams) mayonnaise
• 1 tablespoon (15 milliliters) ketchup
• 1 teaspoon (5 milliliters)  Worcestershire sauce
• 1 teaspoon (5 grams)  kosher salt
• 1/2 teaspoon (2.5 grams) dried thyme
• 1/2 teaspoon (2.5 grams) freshly ground black pepper
• Vegetable oil
• 4 hamburger buns
• 1 large tomato, sliced
• Lettuce leaves