1. Place the olive oil, salt and oregano in a bowl. Rub lightly each baguette slice a couple of times with a cut clove of garlic. Brush them with the scented olive oil.
2. Bake these slices at 200ºC for 10-15 minutes until they are crisp on both sides.
3. Deseed the tomatoes and chop them finely in a bowl. Cut the cucumber in half lengthwise, deseed it, dice it in cubes and add it in. Then add the feta cheese, olives and vinegar.
4. Combine everything well, check if you need to add salt, and place a heaped spoonful on each baguette slice.