Fondant style potatoes traditionally means cutting potatoes into cylinders and then cooking them in broth to make them meltingly tender. I find trimming them to be a bit wasteful so I just slice off the barest ends of a bunch of Yukon gold potatoes and nestle them in a skillet with broth and butter and oil and cook them low and slow.
2 lbs smallish Yukon gold potatoes
2 tablespoons butter, softened
2 tablespoons olive oil
1 clove garlic, minced
1 tablespoon fresh rosemary, chopped
1 teaspoon kosher salt
2-3 cups chicken stock or broth
Trim the potatoes of any eyes or damaged areas and, for those you don’t trim, cut off the ends. Wash well in cold water and drain.
Stir together the softened butter, olive oil, garlic and rosemary. Toss the potatoes with the mixture. Arrange the potatoes in one layer in a 10-inch skillet. Pour in enough stock or broth to come up halfway of the potatoes and bring to a boil over high heat. Reduce the heat to low, cover the pan but leave the lid a tad ajar, and simmer until the potatoes are tender when pierced with a fork, about 20-30 minutes. The liquid should still halfway surround the potatoes; if it doesn’t, keep adding more broth or water until it does.
Once tender, press gently on each potato until they crack open. Return the pan to medium-high heat and boil, uncovered, until all the liquid has evaporated and the potatoes have browned on one side, about 10 minutes. Gently turn the potatoes and brown the other side, another 5 minutes or so.
Remove the pan from the heat and let the potatoes rest for 5 minutes before transferring them to a serving platter. Serve immediately.