Do not cook the potatoes too soft in the skin, peel them and cut them into not too thin (half) slices.
Cut the bacon into cubes and fry brown in a non-stick pan without adding any additional fat. Cut the leek into thin slices, the bell pepper into strips or cubes and add to the pan with the leek to the bacon cubes. Fry or braise briefly until the desired firmness is reached, do not let the leek burn! Now add a little salt and pepper to the potato slices, add to the pan and fry a little. Season well with salt and pepper (possibly also with a little paprika powder).