Baked Japanese Sweet Potato recipe served on a plate, by Pekin the Chef
Jun 04 2026
RestaurantsNightingaleBaked Japanese Sweet Potato Recipe

Baked Japanese Sweet Potato Recipe

Inspired by Nightingale
Time2h
Serves4

Pickled shallots, mushroom xo, chive crème fraîche

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Ingredients

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Sweet Potatoes

Pickled Shallots

Chive Crème Fraîche

Method

Baking Sweet Potatoes

1

Prepare the Sweet Potatoes

Preheat your oven to 400°F (200°C). Wash the Japanese sweet potatoes thoroughly and pat them dry. Prick the sweet potatoes a few times with a fork, then rub with olive oil and sprinkle with salt.

2

Bake the Sweet Potatoes

Place the sweet potatoes on a baking sheet lined with parchment paper. Bake in the preheated oven for about 45-60 minutes, or until they are tender and can be pierced easily with a fork.

Making Pickled Shallots

3

Prepare the Shallots

While the sweet potatoes are baking, thinly slice the shallots and place them in a jar.

4

Pickle the Shallots

In a small saucepan, combine rice vinegar, sugar, and salt. Heat until the sugar dissolves. Pour the mixture over the shallots in the jar, ensuring they are fully submerged. Let them sit for at least 30 minutes.

Making Mushroom XO Sauce

5

Prepare the Mushrooms

Soak the dried shiitake mushrooms in warm water for about 30 minutes until softened. Drain and chop finely.

6

Make the XO Sauce

In a skillet, heat sesame oil over medium heat. Add minced garlic and red chili flakes, sautéing until fragrant. Add the chopped mushrooms and soy sauce, cooking for an additional 5-7 minutes until the mixture thickens.

Making Chive Crème Fraîche

7

Combine Ingredients

In a bowl, mix crème fraîche, finely chopped chives, and lemon juice until well combined. Season with salt to taste.

Serving

8

Plate the Dish

Once the sweet potatoes are done, slice them open and top with mushroom XO sauce, pickled shallots, and a generous dollop of chive crème fraîche. Serve warm.