Method
Preheat the oven to 220°C (425°F) with a rack in the centre. Cut the potatoes into wedges, toss with a little oil and salt and spread on a lined tray.
Roast the wedges for 25 minutes, turning once, until crisp.
Mix the turkey with the chopped parsley, green onion tops, Dijon, salt and pepper and shape into 4 patties about 2 cm (3/4 inch) thick.
Preheat the grill or a skillet over medium-high heat and oil it lightly.
Cook the patties for about 5 minutes per side, until they reach 74°C (165°F) in the centre.
Toast the gluten-free bread or buns and build the burgers with lettuce, tomato and mayonnaise. Serve with the wedges.
Storing and reheating
Cooked patties keep 3 days.