For the tartar sauce, finely dice the shallot and cucumber. Pluck the parsley leaves from the stems and chop finely. Mix the prepared ingredients with the mayonnaise.
Cut the tomatoes into slices. Halve the baguette horizontally. Brush the cut surfaces with tartar sauce. Cover the bottom with tomatoes, ham and cheese. Place the top of the baguette on top.
Bake in a hot oven at 220 ° C (top / bottom heat, circulating air: 200 ° C) for approx. 8 minutes. Cut into 4 pieces.