Heat oven to 200C/180C fan/gas 6. Heat the oil in a small pan, add the onion, fry for a few mins until lightly browned and soft, then cool. Mix the turkey with the lemon zest, thyme, parsley, onion and seasoning until well combined.
Shape the mixture into 4 burgers and wrap a rasher of bacon around each. Put in a roasting tin, bake for 20-25 mins, then pan-fry for a few mins on each side to crisp up the bacon. Serve in a bun with lettuce, sliced tomato, tomato sauce and vegetable chips (recipe below).