Roasted acorn squash is sweet and tender with caramelized edges and a soft, scoopable flesh. The filling is savory and nutty — sautéed mushrooms, toasted walnuts, quinoa and fresh herbs create a hearty bite. Textures contrast between creamy squash, tender grains, and a lightly crisp breadcrumb topping, brightened by lemon and parsley. Serve warm as a cozy autumn main or alongside a crisp salad for a holiday vegetable centerpiece.
Ingredients
- 2 medium acorn squashes (halved, seeded — about 3–4 lb total)
- 2 tbsp olive oil, divided
- 1 tsp kosher salt, divided
- 1/2 tsp freshly ground black pepper, divided
- 10 oz cremini or button mushrooms (finely chopped)
- 1 medium yellow onion (finely chopped)
- 3 garlic cloves (minced)
- 3/4 cup walnuts (toasted, chopped)
- 1 cup cooked quinoa (about 1/3 cup dry)
- 1 tbsp tamari or low-sodium soy sauce
- 2 tbsp nutritional yeast
- 1 tbsp fresh thyme leaves (or 1 tsp dried)
- 1/4 cup fresh parsley (chopped) plus extra for garnish
- 1 tsp lemon zest and 1 tbsp lemon juice
- 1/3 cup panko breadcrumbs (or gluten-free crumbs)
- 1 tbsp vegan butter or additional olive oil (for topping)
Instructions
- Preheat the oven to 400°F (200°C). Brush the cut sides of the acorn squash with 1 tbsp olive oil and season with 1/2 tsp salt and 1/4 tsp pepper. Place cut side down on a baking sheet and roast 25–30 minutes until tender when pierced.
- Meanwhile, heat the remaining 1 tbsp olive oil in a large skillet over medium heat. Add the chopped onion and cook 5 minutes until translucent.
- Add the mushrooms and a pinch of salt; sauté 7–9 minutes until most liquid evaporates and mushrooms begin to brown. Stir in the garlic and cook 1 minute until fragrant.
- Stir in the toasted walnuts, cooked quinoa, tamari, nutritional yeast, thyme, lemon zest, lemon juice, chopped parsley, and remaining 1/2 tsp salt and 1/4 tsp pepper. Cook 2 minutes to combine flavors, then remove from heat.
- Flip the roasted squash halves cut side up and spoon the mushroom-walnut-quinoa mixture into each cavity, packing lightly. Set squash back on the baking sheet.
- Mix the panko with vegan butter (or 1 tbsp olive oil) and sprinkle evenly over the stuffed squash. Return to the oven and bake 10–12 minutes more until topping is golden and squash is fully tender.
- Remove from oven and let rest 5 minutes. Garnish with extra chopped parsley and an extra squeeze of lemon if desired. Serve warm as a main or alongside a simple green salad.
Tips or Variations
- Swap quinoa for cooked farro or brown rice for a chewier texture; add raisins for sweet contrast.
- For a spicier note, stir 1/2 tsp smoked paprika or a pinch of red pepper flakes into the filling.