Pin Acorn squash halves roasted until tender, stuffed with deeply caramelized onions and melty Gruyere cheese, and finished with fresh herbs—a comforting, gourmet vegetarian main perfect for any occasion.
This recipe has become a family favorite thanks to its rich flavors and simple preparation.
Ingredients
- Squash: 2 medium acorn squash, halved lengthwise and seeded, 2 tablespoons olive oil, 1/2 teaspoon kosher salt, 1/4 teaspoon ground black pepper
- Caramelized Onions: 2 large yellow onions, thinly sliced, 2 tablespoons unsalted butter, 1 tablespoon olive oil, 1/2 teaspoon kosher salt, 1/2 teaspoon granulated sugar, 2 teaspoons balsamic vinegar
- Filling and Garnish: 1 1/2 cups Gruyere cheese, grated, 2 tablespoons fresh thyme leaves plus more for garnish, 1/4 cup chopped fresh parsley (optional)
Instructions
- Step 1:
- Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
- Step 2:
- Brush the cut sides of the acorn squash with olive oil. Season with kosher salt and black pepper. Place squash halves cut side down on the prepared baking sheet and roast for 35 40 minutes, or until the flesh is fork-tender.
- Step 3:
- Meanwhile, heat unsalted butter and olive oil in a large skillet over medium low heat. Add the sliced onions and kosher salt. Cook, stirring occasionally, for 30 35 minutes until the onions are deeply golden and soft. Sprinkle with sugar about halfway through to encourage caramelization.
- Step 4:
- Stir in the balsamic vinegar and fresh thyme. Cook for 2 minutes, then remove from heat.
- Step 5:
- Remove squash from the oven and carefully turn cut side up. Reduce oven temperature to 375°F (190°C).
- Step 6:
- Evenly distribute the caramelized onions among the squash cavities. Top each half with grated Gruyere cheese.
- Step 7:
- Return the filled squash to the oven and bake for 15 20 minutes, or until the cheese is melted and golden brown at the edges.
- Step 8:
- Remove from the oven. Garnish with fresh parsley and additional thyme leaves before serving.
Pin This dish brings everyone together around the table, savoring every bite on cozy evenings.
Tips for Perfect Squash
Make sure the squash is fully ripe and firm for the best texture and sweetness after roasting.
Cheese Selection
Gruyere cheese melts beautifully and adds a nutty depth of flavor that complements the sweet onions and squash.
Serving Suggestions
Pairs wonderfully with a crisp green salad or crusty sourdough bread for a complete meal.
Pin This recipe elevates simple ingredients into a memorable, satisfying dish for any occasion.
Recipe Q&A
- → How do you achieve perfectly caramelized onions?
Cook sliced onions slowly over low heat with butter and olive oil, stirring occasionally. Add a pinch of sugar halfway through to enhance caramelization and deepen the flavor.
- → Why roast acorn squash cut side down?
Roasting squash cut side down helps trap steam and concentrates its natural sweetness while softening the flesh evenly.
- → Can I prepare this dish ahead of time?
Yes, roast the squash and caramelize onions ahead, then assemble and bake just before serving to preserve freshness and texture.
- → What cheese works best for melting in this dish?
Gruyere cheese melts smoothly and adds a creamy, slightly nutty flavor that complements the sweetness of the squash and onions.
- → Are there suggested herbs to garnish the dish?
Fresh thyme and parsley add brightness and a fresh herbal note that balances the richness of the cheese and onions.
