Directions
Slice the chilled, deveined foie gras lobe crosswise into four generous ¾-inch / 2 cm thick medallions.
Season both sides liberally with flaky sea salt and freshly ground black pepper.
Heat a heavy-bottomed skillet (like cast iron) over medium-high heat.
Add 1 tsp / 5 ml of coconut oil; the pan should be hot but not smoking.
Carefully place two foie gras medallions in the hot pan.
Sear for 60-90 seconds per side, until a deep golden-brown crust forms and the fat has rendered. The inside should be soft but not liquid. Immediately transfer to a plate lined with a paper towel.
Repeat with the remaining two medallions, adding the second teaspoon of oil if the pan looks dry.
Pour off all but 1 tablespoon (15 ml / 0.5 fl oz) of the rendered duck fat from the skillet.
Return the skillet to the heat and deglaze with 2 tbsp / 30 ml of balsamic vinegar, scraping up any browned bits from the bottom of the pan.
Let it bubble and reduce by half, creating a syrupy glaze. This will only take about 30-60 seconds.
To serve, place the seared foie gras on plates and drizzle the warm balsamic glaze over the top.
Serve immediately.
Don't overcrowd the pan.
Searing in batches ensures the pan temperature stays high, giving you a crisp crust instead of a steamed, greasy result.