Beat the eggs with milk, add baking powder, oil, salt, pepper and oregano, mix in the flour and oats and pour on a butter greased baking sheet. Sauté the onion and garlic until golden and then add cut up spinach. Sauté for a few minutes. Put the mixture evenly on the dough, add sliced tomatoes, sprinkle with (bacon, ham, turkey) cheese, and oregano. Bake for about 20 minutes at 270F.