This is one of the recipes I found on the web while investigating Swedish herring recipes. The original is by David Weinehall. It became clear to me that I needed to make this dish when I found that I had one of the most elusive ingredients—lumpfish roe—in the fridge.

Ingredients

Original	quantity	ingredient
1 jar	250g	Matjes filets
1 dl	20 g	Leek
3	180g	Hard-boiled eggs
1		Egg yolk
1 tablespoon	15 ml	French mustard
	100 ml	oil
	100 ml	Sour cream
1 jar	50 g	Red lumpfish roe
	50 ml	Chopped dill
	50 ml	Chives

Steps

1. Chop the matjes into cubes about 5 to 10 mm on a side.
2. Mix the egg yolk, mustard and oil, stirring throughly.
3. Mix in the remaining ingredients, reserving a little hard-boiled egg and leek for the garnish.
4. Preferably cool for an hour or more before serving.
5. Serve with boiled potatoes.