Put 2 pounds potatoes in a large bowl, cover them with lukewarm water, and peel them with a vegetable peeler. Cut out any black spots.
Quarter the peeled potatoes and drop them into a pot of cold water.
Drain the potatoes, then pour in fresh cold water until it sits about 1 inch (2.5 cm) above them.
Add 1 teaspoon salt, 2 teaspoons caraway seeds, and chopped 1 Tablespoon lovage greens to the water.
Cover the pot and bring the water to a boil over high heat. Then turn the heat down to minimum and leave the lid slightly ajar, so the water bubbles gently.
Cook for about 15 minutes, then prick a piece with a fork. If the fork slides in with no resistance, the potatoes are done. If not, cook them 3 to 5 minutes more and test again.
Drain the potatoes carefully. Serve them warm, drizzled with 2 Tablespoons unsalted butter, melted.
Notes
Potatoes: Waxy or all-purpose types hold their shape when boiled; starchy russets tend to fall apart.
No kitchen scale? One medium US potato weighs roughly 6 oz (170 g); use that to estimate the amount you need.
Simmer, never a rolling boil: gentle bubbles keep the pieces whole.
No fresh lovage? Use dried lovage (start with less, it is stronger), or skip it and let the caraway season the potatoes.