Mix the eggs and yoghurt together. Add the flour, baking powder, salt, oil and stir once again (to get a thick mixture).
Heat the oven to 356°F (180 °C). Cover the muffin tray with muffin cups.
Distribute the mixture into the cups and put a cherry tomato in each one, press down on it so it sinks.
Smear ketchup on top, grate cheese and stick an olive in each muffin.
Bake for 35-40 min.