Preheat the oven to 180 degrees top and bottom heat.
Butter a tart pan, put in the batter and spread the tomatoes on top.
Whip 200 ml of cream a little with the mixer so that the tart is fluffier. Stir in eggs, olive oil, salt, pepper, nutmeg and a pinch of oregano. Pour the mixture on the tomatoes, cut the fresh goat cheese into pieces and spread on top.
Bake for 30-40 minutes on the middle rack, until the filling is firm.