Heat oven to 220C/200C fan/gas 7. Toss
the chips with the oil, 1 tsp chilli flakes
and some seasoning. Arrange in a single
layer on a large baking tray and cook for
about 30 mins, turning halfway through.
Put the mince, remaining chilli flakes,
onion, Parmesan, tomato ketchup and
lots of black pepper in a large bowl and
mix to combine. Shape into 4 burgers.
Ten mins before the chips are ready, put
the burgers on a baking tray and bake
for 10 mins until cooked through.
Top one half of the buns with the
lettuce, tomato and onion. Add the
burgers, then top with the roll tops.
Serve with chips and pickles on the side.