The Most Indulgent Grilled Lemon Chicken Burgers Recipe

Ingredients

• Brioche Burger Buns
• beef mince
• sea salt
• black pepper
• thyme
• mayonnaise
• garlic
• truffle oil
• 1 small onion, peeled and sliced thinly
• 2 tsp olive oil
• 1 tbs butter
• 100g chestnut mushrooms, sliced
• 120g swiss cheese such as Emmental or Gruyere, grated
• 50g (approx. two large handfuls) baby spinach leaves
• Gem or romaine lettuce leaves, washed
• 2 vine tomatoes, thinly sliced