Best-ever burgers | Slimming World

Ingredients

• 2 onions, 1 grated, 1 thinly sliced
• 500g lean beef mince (5% fat or less)
• 1 garlic clove, crushed
• 1 tbsp Worcestershire sauce
• 1 tsp mustard powder
• 1 cal cooking spray*
• 4 x 60g wholemeal rolls
• 4 crisp lettuce leaves
• 2 tomatoes, thickly sliced