*Preparation* Preheat the oven to 180ºC. Drain the oil from the tuna.
Mix together the margarine, egg and sugar in a bowl.
Sift together the flour and baking powder and fold into the mixture.
Stir in the milk, mayonnaise and grated cheese.
Add the drained tuna, chopped onion, corn, basil, salt and pepper and combine.
Pour evenly into 6 muffin cups. Sprinkle melting cheese on top if you like.
Bake in the 180ºC oven for about 30 minutes.
This is how the muffin looks cut in half. You can add more corn kernels if you like.