Ultimate Grilled Blue Cheese Walnut Burger

Ingredients

• 1 lb (450 g) ground beef (80/20 blend preferred)
• 1/2 cup (50 g) crumbled blue cheese
• 1/2 cup (60 g) finely chopped walnuts
• 1 clove garlic, minced
• 1 tsp (5 g) Worcestershire sauce
• 1/2 tsp (2.5 g) salt
• 1/4 tsp (1 g) black pepper
• 4 whole wheat hamburger buns
• 1 cup (30 g) arugula or spinach
• 1/2 red onion, thinly sliced
• 1 cup (240 g) sliced tomatoes
• Optional condiments (e.g., mayo, mustard, or balsamic glaze)