6 eggs
2 medium onions
1–2 tbsp mayonnaise
vegetable oil for frying
a pinch of salt
Hard-boil the eggs, peel, and cut them in half
Dice the onion and sauté in vegetable oil until golden
Mash the yolks with a fork, mix with the onion, season with salt, and add mayonnaise
Fill the egg whites with the mixture
Garnish as desired (I used smoked salmon)