Place the flour, yeast and salt in a large bowl and mix to combine. Add the water and oil (or yoghurt) and mix well. Add enough water to create a very soft, almost moist dough, then turn out onto a well floured surface and knead for about 5 minutes.
Place the kneaded dough back in the bowl and cover with a damp dishcloth or shower cap, and leave to rise in a warm place for up to an hour.
When the dough is ready, shape it into small round balls, then flatten it a little. Lightly fry in a frying pan with a little oil for about 4 minutes on each side until they are cooked. If they are a little doughy in the middle, put in the oven for an extra 5 minutes.
Preheat the grill. Place good quality bacon on a wire rack over a foil-lined baking tray, and place under the hot grill for around 6 minutes, until slightly crispy. Brush both sides of the bacon with maple syrup and put it back under the grill for another 2 minutes on each side. Let it cool a little.
The maple syrup gets very hot, so be careful!
Alternatively, for a quick version (with less cleaning), fry the bacon in a pan until slightly crispy, drain the excess fat, drizzle the maple syrup over it and fry it again until crispy.
Now layer the bread, cheese and bacon strips, drizzle a little maple syrup over it and hold it together with a cocktail stick. Add some tomatoes for extra colour!