Step by step recipe:

1. 1 min.
   Wash and cut 1 tomato in half.
   
   If you like the flavour, peel 1 shallot and cut in half.
2. 3 min.
   Toast 4 slices bread (a French baguette, even a bit dry, works well).
3. 1 min.
   If you have opted for using a shallot, rub it over each slice of toast.
4. 1 min.
   Then rub the cut tomato over each slice, making sure that plenty of juice soaks in.
5. 1 min.
   Salt and pepper each slice, then drizzle with olive oil (preferably Spanish).
6. 
   Serve one slice per person as an aperitif snack.
   
   You can also serve it cut into bite-sized pieces that are easier to manage with a glass in your hand.