Clean the fennel and cut off the roots. Cut bulb into narrow strips. Finely chop fennel greens.
Sauté fennel strips in butter in a saucepan. Season with salt and pepper. Deglaze with white wine and apple juice. Simmer uncovered for about 10 minutes until liquid is almost reduced.
Lay out the ham slices on a work board, spread the fennel strips and greens evenly on top, roll up. Line an ovenproof dish. Fill with the ham rolls. Top with cubes of the skinned, seeded tomatoes and season with salt and vinegar. Top with slices of muenster cheese.
Bake in the oven at 180 °C until the cheese melts. Serve with white bread.
Tip: Always use an aromatic ham, it will give your dish a wonderful touch!