Instructions
- Spray a large, heavy-based non-stick frying pan with low-calorie cooking spray and put it over a high heat. Add the beef, onion and garlic and stir-fry for 7-8 minutes, or until the beef is cooked through and the onions have softened. Take the pan off the heat and drain any fat from the mixture. Season lightly.
- While the beef is cooking, put all the sauce ingredients in a bowl with 4 tbsp water and whisk until well combined.
- Mix together the lettuce, gherkins, onions and tomatoes and divide between 4 wide bowls. Spoon the beef mixture on top, divide the sauce between the burgers and serve hot.