Hrenovke (hrenovke)

Instructions

1. Bring a pan of lightly salted water to a gentle simmer, without letting it boil hard.
2. Add the sausages and poach them for 8 to 10 minutes, without boiling.
3. Meanwhile, finely slice the red onion and the gherkins.
4. Split the rolls keeping the hinge intact and warm them for 2 minutes in the oven or a pan.
5. Spread each roll with mustard and horseradish, then place a sausage inside.
6. Add the onion, gherkins and ketchup, then serve immediately.