Sometimes you just need something simple, like a grilled cheese with Jarlsberg®, tomatoes, ham and mayonnaise.
Spread the mayonnaise on the slices of bread and slice the tomato. Add the cheese slices, ham and tomato and place the two halves together. Mix together the yogurt 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 cheese straight into the pan and fry the sandwich in it.