Cheese burger with mushroom sauce

Preheat the oven to
200°C.

1 PATTIES

Mix the ingredients
and divide into four
equal portions.

Shape
each into a patty.

 Fry in a heated
cast-iron griddle pan
until brown on both
sides.

Transfer to a
baking sheet and roast
in the oven for about
10 minutes or until
cooked but still slightly
pink inside.

2 CARAMELISED
ONIONS

Heat the
oil in a pan and fry
the onions until soft.

Add the vinegar and
brown sugar and fry
until the sugar starts
to caramelise and the
vinegar has almost
completely evaporated.

3 CHEESE AND
MUSHROOM
SAUCE

Heat a little
butter and oil in a pan
and fry the onion and
mushrooms until soft.

Add the sherry and
heat until evaporated.

Add the cream and
heat until the sauce has
reduced by half.

Remove from the heat
and stir in the cheese
and mustard until the
cheese has melted.Season with salt and
pepper.

4 TO FINISH

Put a layer of lettuce
leaves on the bottom
half of each roll,
followed by a slice
of cheese, a patty,
gherkin strips and
tomato slices.

Spoon
a generous dollop of
caramelised onion
over and top with the
second half of the roll.

5 TO SERVE

Serve with the cheese
and mushroom sauce
and shoestring chips