Pommes de Terre Fondantes (Fondant Potatoes) Recipe

Ingredients (9)

• 1 1/2 cups homemade chicken or beef stock, or store-bought low-sodium chicken broth, plus extra as needed
• 1/4 ounce (2 1/2 teaspoons; 1 packet; 7g) unflavored gelatin, such as Knox
• 2 1/2 pounds (1.1kg) Yukon Gold potatoes, about 2 1/2 to 3 inches long each, peeled
• Kosher salt and freshly ground black pepper
• 2 tablespoons (30ml) vegetable oil, beef fat, schmaltz, or duck fat (see note)
• 4 tablespoons (55g) unsalted butter
• 3 medium garlic cloves (15g), peeled and smashed
• 1 tablespoon fresh thyme leaves, chopped
• Flaky sea salt, such as Maldon, for finishing (optional)