Cook the Sweet Potatoes: Cook the sweet potatoes in a pan of boiling water.
Add the Fish: After five minutes, add the fish to the pan.
Drain and Set Aside: Once the sweet potatoes are tender, drain the potatoes and fish, and set aside.
Sauté the Onion: Heat the coconut oil in a pan over medium heat and sauté the onion until soft and translucent.
Prepare the Fish: Once the fish and potatoes have cooled enough to handle, flake the fish into smaller pieces and remove any skin and bones.
Mix the Ingredients: In a bowl, beat the eggs, season with salt and freshly ground black pepper, and add the chives, potatoes, and fish.
Cook the Omelette: Pour the mixture back into the pan with the onions and cook over medium heat for a few minutes until the omelette is set.
Serve: Cut the omelette into slices and serve warm. Alternatively, this can be made in advance, stored in the fridge, and enjoyed cold.