Heat a teaspoon olive oil in a non-stick frying pan and gently cook half a finely chopped onion and a grated carrot, a pinch of mixed dried herbs and half a courgette (optional) for 8 minutes. Add a clove of crushed garlic and cook for 1 minute. Grind in some black pepper and a dash of Worcestershire sauce, 100g-turkey mince and a small beaten egg. Form into two burgers and dust lightly with flour. Heat a non-stick frying pan, brush with oil and gently cook the burgers for about 6 minutes either side, depending on thickness. If thicker, they could need slightly longer. Prepare a wholemeal roll by slicing in half and spreading a teaspoon of light mayonnaise on the bottom half and a teaspoon of ketchup on the other half. Pile lettuce on top of the mayo, top with the cooked burgers and add slices of tomato and onion followed by the other part of the roll.