Tunna sallad ( or paste )

2 cans of tuna flakes in oil
250 gr butter
1 lemon
2 onions
salt and pepper

Very simple : chopp the onions, drain the oil from the tuna cans.Mix the tuna flakes with the butter until the butter is soft and nice, add the onion, juice of the lemon , salt and pepper and mix with the kitcken mixer till it becoms like a really nice foamy paste. Done! Really simple and really yummy on toast too!!