Place the butter and olive oil into a frying pan

Melt over a low temperature

Add the leek and sauté until soft

Set aside

Spread one slice of the bread with chutney

Place the cheese onto the bread

Place the tomatoes on top

Season generously

Add the leeks

Spread the other slice of bread with mayonnaise

Top the leeks with this slice to make a sandwich

Place the sandwich onto the grill and braai until the cheese starts to melt or is warmed through