Sometimes you just need something simple, like a toastie with Jarlsberg®, tomatoes, ham and mayonnaise.
Spread the mayonnaise on the slices of bread and slice the tomato. Add the Jarlsberg® cheese slices, ham and tomato and place the two halves together. Mix together the yoghurt and mustard for the dip. Fry the sandwich in butter over a medium-high heat for a few minutes on each side. For a so-called “inside out” variant with cheese on the outside, you can grate extra Jarlsberg® straight into the pan and fry the sandwich in it.