Heat 2 tablespoons of oil in a frying pan. Fry the slices of bread in it from both sides until brown, season with a little salt, remove
Peel and chop the garlic. Cut avocados in half, remove stones, remove flesh from the skin. Halve 1 avocado half lengthwise and cut into slices. Purée the rest of the avocado, garlic, lemon juice and 1 tsp. oil. Stir in yoghurt. Season to taste with salt, pepper and sugar. Cut olives into slices
Spread slices of bread with avocado cream, cover with avocado slices and olives