Original calls for ramellet tomatoa mallorcan variety and mallorcan olive oil, but it's not easy to find, so just choose a good oil. In simple recipes as this, the quality of the ingredients is key.
Instructions
[Optional] Rub the bread with a garlic clove
Rub the bread slices with a ripe halved tomato [tip: you can grate the tomato pulp with a cheese grater to have the tomato "sauce" pre made]
Pour some olive oil on top.
Choose your toppings and place on the bread, add some olives capers or similar.