dough:2 cups self-raising flour
1-2 knobs of butter
some water
tomatoes puree
other toppings

Mix the flour with the butter, add enough water to make a dough. Pat this dough into a base and put the tinfoil on some ashes. Cook the bases on the tinfoil and add the toppings of your choice. Wrap in the tinfoil and place back on the ashes.
The bases can be baked at home in advance and try experimenting with herbs in the tomatoes puree.