In a mixing bowl, mash the bananas, add the eggs and mix well. If the mixture is a little runny, do not worry.
Place a heavy-based frying pan on medium heat.
Add a little butter and olive oil, when well heated, spoon a little mixture in, one at a time. When bubbling on top turn and cook for 1 to 2 minutes more. Repeat with a little butter and oil and continue with the leftover mixture.