Mary Berry’s Boulangère Potatoes is a classic French-inspired dish where potatoes and onions are thinly sliced, layered, and baked in a savory broth. The result is a tender, flavorful bake with a golden, crispy top. Unlike heavier potato dishes that rely on cream or cheese, this recipe allows the delicate flavors of the potatoes, onions, and herbs to shine through, making it a lighter yet equally delicious side dish.
Preheat your oven to 190°C (375°F) and lightly grease an ovenproof baking dish with olive oil.
Using a mandoline or sharp knife, thinly slice the potatoes and onions. Aim for even slices to ensure they cook uniformly and absorb the flavors of the stock.
In the prepared baking dish, layer the potatoes and onions alternately, starting with a layer of potatoes. Sprinkle salt, pepper, garlic, and fresh thyme between each layer to ensure every bite is flavorful.
In a saucepan, gently heat the stock. Pour the warm stock over the layered potatoes and onions, making sure it reaches just below the top layer of potatoes.
Drizzle the olive oil over the top layer of potatoes to help them crisp up during baking.
Place the dish in the preheated oven and bake for 60-70 minutes, or until the potatoes are tender and the top is golden and crispy. If the top begins to brown too quickly, cover with foil halfway through baking.
Once the Boulangère Potatoes are beautifully golden and cooked through, remove them from the oven and allow them to rest for a few minutes before serving. This will help the layers set slightly and enhance the flavor.