Place the eggs and spring onions into a bowl and whisk together.
Melt the butter in a small frying pan until foaming. Add the egg mixture and cook for two minutes.
Preheat the grill to high.
Sprinkle the omelette with the crabmeat and Taleggio, season with salt and freshly ground black pepper and place under the grill for four minutes.
To serve, turn the omelette out onto a plate and sprinkle with the remaining tablespoon of chopped spring onions.