Roasted Acorn Squash with Creamy Buckwheat, Golden Leeks and Thyme Cheddar Sauce
🥦 Vegetarian
Intermediate

Roasted Acorn Squash with Creamy Buckwheat, Golden Leeks and Thyme Cheddar Sauce

An original vegetarian dish of roasted acorn squash stuffed with creamy buckwheat, golden leeks, sautéed mushrooms and spinach, finished with a smooth thyme cheddar sauce and a crunchy sprinkle of pumpkin seeds.

25 minPrep
45 minCook
70 minTotal
4Servings
VegetarianGluten-Free

Ingredients

Adjust servings
4
  • 2 pequeñas approx. 1200 g acorn squash (cut por the mitad and without semillas)
  • 4 60 ml olive oil (divided)
  • 6 6 g salt (or to taste)
  • 1 1 g black pepper (freshly ground)
  • 180 180 g buckwheat groats (enjuagado)
  • 480 480 ml vegetable broth (hot)
  • 1 grande 180 g leek (en medias lunas finas, solo parte blanca and verde clara)
  • 200 200 g mushrooms (thinly sliced)
  • 2 dientes 8 g garlic (chopped)
  • 80 80 g fresh spinach (chopped gruesa)
  • 2 2 g fresh thyme (hojitas, divided)
  • 120 120 g sharp cheddar, grated (divided)
  • 180 180 ml milk (whole or semidesnatada)
  • 8 8 g cornstarch (for espesar the sauce)
  • 5 5 ml Dijon mustard (optional pero recomendada)
  • 30 30 g pumpkin seeds (lightly tostadas)
  • 1 pizca 0.5 g nutmeg (for the sauce)

Nutrition facts

per serving

378 kcal
Calories
15.2 g
Protein
34.6 g
Carbs
21.1 g
Fat
6.8 g
Fiber
27.8 g
Net carbs

Approximate nutritional information. Estimated from the recipe’s ingredients and amounts, using standard reference nutrition values. It may vary with brands, sizes and cooking method. For guidance only; not a substitute for medical or dietary advice.

Allergens

DairyMustard

Instructions

  1. 1

    Preheat the oven to 220 °C / 425 °F. Place the acorn squash halves on a baking tray, rub them with 2 tablespoons olive oil, season with half the salt and the black pepper, and roast for 30 to 35 minutes until tender and browned around the edges.

  2. 2

    While the squash roasts, place the buckwheat groats and vegetable broth in a saucepan. Bring to a boil, reduce the heat, cover, and cook for 12 to 15 minutes until the grains are tender and the liquid is absorbed. Turn off the heat and let rest for 5 minutes.

  3. 3

    Heat 1 tablespoon olive oil in a large skillet over medium heat. Add the leek and cook for 5 minutes, stirring, until soft and lightly golden. Add the mushrooms and cook for 6 to 8 minutes until they release their moisture and brown. Stir in the garlic and 1 teaspoon fresh thyme and cook 30 seconds more.

  4. 4

    Add the fresh spinach to the skillet and cook for 1 to 2 minutes until wilted. Fold in the cooked buckwheat and mix well. Add 60 g (2 oz) grated cheddar and stir until melted. Taste and adjust with the remaining salt if needed.

  5. 5

    For the sauce, whisk the milk and cornstarch in a bowl until smooth. Transfer to a small saucepan and cook over medium heat, stirring, until it starts to thicken. Add the Dijon mustard, nutmeg, the remaining teaspoon fresh thyme, and the remaining 60 g (2 oz) cheddar. Stir until smooth and creamy.

  6. 6

    Remove the roasted squash from the oven. If desired, gently press the center with a spoon to create more room for the filling without breaking the skin. Fill each half with the creamy buckwheat mixture.

  7. 7

    Spoon some of the thyme cheddar sauce over each filled half and finish with the toasted pumpkin seeds on top.

  8. 8

    Return the tray to the oven and bake for 8 to 10 minutes more at 200 °C / 400 °F, until the filling is piping hot and the top is lightly gratinéed. Serve the remaining sauce on the side.

Chef tips

For a creamier texture, stir the buckwheat right after turning off the heat and let it rest covered. Toast the pumpkin seeds in a dry pan for 2 to 3 minutes to deepen their flavor.

Substitutions

You can replace the cheddar with aged gouda or fontina. If you cannot find buckwheat, use cooked brown rice, though the result will be less creamy.

What I used to make it

Generic kitchen tools that work for this recipe. You don’t need to buy anything to make it.

  • Illustrative image: Air fryerIllustrative image

    Cosori Pro LE 5 Qt Air Fryer

    Browning and baking with little oil

    • Browns food with very little oil
    • Handy for vegetables, chicken and reheating
    • Check the basket capacity
    View on Amazon
  • Illustrative image: Non-stick frying panIllustrative image

    T-fal Ultimate Hard Anodized 12" Non-Stick Pan

    Eggs, omelets and stir-fries

    • Eggs and omelets that don’t stick
    • Comfortable, sturdy handle
    • Use wooden or silicone utensils
    View on Amazon
  • Illustrative image: Chef’s knifeIllustrative image

    Victorinox Fibrox Pro 8" Chef’s Knife

    Chopping, slicing and cutting strips

    • The knife I use most when cooking
    • Chops, slices and cuts into strips
    • Keep it sharp and hand-dry it
    View on Amazon

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