Mix all of ingredients for the burger together. Form into 4 patties.
Cook the burgers on a grill pan for 15 mins, turning on a regular basis.
Top each burger with a slice of cheese towards the end of cooking time and allow to melt.
Mix together the mayonnaise and lettuce.Cut the ciabatta into 4 and toast on grill.
Top the bottom of the ciabatta with some lettuce and mayo followed by a slice of tomato.
Place the burger and cheese on top followed by a slice of red onion.
Top with the other half of ciabatta..
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