Heat oven to 200C/180C fan/gas 6.
Drizzle the potatoes with the oil and
some salt and pepper. Bake on a
roasting tray for 25 mins, until starting
to go brown.
Remove and turn the chips. Push
to edges of the tray, put the gammon
in the centre and cook for 7 mins more.
Take the tray out of the oven and turn
the gammon over, then crack the egg
into the corner of the tray. Cook for
7 mins more until the egg is set and
the gammon is cooked through. Serve
with ketchup, if you like.