From the roundup: 24 Fall Casserole Recipes for Cozy Comfort Dinners
This roasted acorn squash and quinoa casserole is one of those fall dinners that looks more involved than it actually is. The squash roasts for about 30 minutes while you cook the quinoa on the stovetop, and then everything comes together in one baking dish for a short second bake. Active time is maybe 20 minutes. The rest is the oven doing its job.
The maple-mustard dressing is what makes it worth making again. It hits sweet, tangy, and a little savory all at once, and it coats the squash and quinoa in a way that keeps the whole thing from tasting flat. The cranberries and pepitas are not just for looks. The cranberries cut through the sweetness and the pepitas give you something to actually chew.
It serves four as a main, and it holds up well the next day, which matters when you are feeding a full table and want something that travels from fridge to oven without falling apart.
How this one ended up in the rotation
I made this the first time because I had two acorn squash sitting on the counter for longer than I want to admit, and I needed to use them before they went soft. I had quinoa in the pantry and a half-used jar of Dijon, and this is basically what came out of that. My husband was skeptical about a casserole with no cheese and no meat, but he went back for seconds, which told me enough.
One of my kids picks out the cranberries and eats them separately, which is fine. The rest of the dish disappears pretty reliably, and I have brought it to two different Friendsgiving tables where people asked for the recipe. It is a good one to have when you need something that feels a little more intentional than a weeknight side dish.
Why you will love this
- The quinoa cooks at the same time the squash roasts, so there is almost no waiting around once you start
- One maple-mustard dressing does all the seasoning work, no extra sauces or layers needed
- Naturally gluten-free and plant-based, so it fits a lot of different tables without modifications
- Leftovers reheat well and taste just as good the next day straight from the fridge
- The pepitas stay crunchy through the bake and add enough texture that it does not eat like mush
Tips for success
- Roast the squash cut-side down the whole time. It sounds backwards but the flat side gets golden and slightly caramelized against the pan, which adds flavor you do not get from roasting it face-up.
- Season the quinoa mixture aggressively before it goes into the baking dish. Quinoa absorbs a lot, and what tastes well-seasoned in the bowl will taste underseasoned once it bakes. Taste it twice.
- Let the squash cool for a full 10 minutes before scooping. If you rush it, the flesh tears into mush instead of rough chunks, and the texture of the finished casserole is better when there is some variation in the pieces.
- Do not overbake the final stage. You are warming everything through and setting the top, not cooking it further. Pull it when the edges look set and the top feels dry, closer to 15 minutes than 20 if your oven runs hot.
If the casserole turns out bland or watery
- Bland: The dressing needs full salt at the mixing stage. If it tastes flat after baking, a light drizzle of olive oil and a pinch of flaky salt on top at serving fixes most of it.
- Watery: This usually means the squash was not roasted long enough. The cut sides should look golden and feel dry before you scoop the flesh. Underdone squash releases water into the casserole.
- Soggy top: Make sure the quinoa is fully cooked and the steam has had a chance to escape before mixing. Covering the pan during the final bake traps moisture, so keep it uncovered.
- Too sweet: Cut the maple syrup to 2 tablespoons and add a small extra splash of apple cider vinegar to balance it.
Substitutions
Butternut squash or delicata squash both work in place of acorn squash. Delicata has thinner skin and roasts a little faster, so check it at 25 minutes. Dried cherries or raisins can replace the cranberries if that is what you have. Sunflower seeds or roughly chopped walnuts substitute for pepitas without changing the dish much. Honey works in place of maple syrup if needed, though it is a little sweeter, so start with 2 tablespoons. Whole-grain mustard is a fine swap for Dijon and gives the dressing a slightly coarser texture.
For picky eaters who push back on quinoa, you can mix in half cooked brown rice and half quinoa and most kids stop noticing. The cranberries can be left out or served on the side without affecting the rest of the dish.
Make-ahead and storage
Both the acorn squash and the quinoa can be cooked up to two days ahead and stored separately in the fridge. When you are ready to serve, mix everything together with the dressing and do the final bake as written. This is the easiest way to manage it if you are cooking for a holiday meal and the oven is already crowded.
Leftovers keep in a covered container in the refrigerator for up to four days. Reheat in a 350 degree oven for 10 to 15 minutes, or in the microwave in 60-second bursts. A small drizzle of olive oil before reheating helps with moisture. Skip the freezer on this one. The squash turns watery after thawing and the texture does not recover.
Roasted Acorn Squash and Quinoa Casserole
Ingredients
Equipment
Method
- Heat the oven to 400 degrees F. Place the four acorn squash halves cut-side up on a large rimmed baking sheet. Brush the cut surfaces with 1 tablespoon of olive oil and sprinkle with 1/4 teaspoon salt and the black pepper. Flip them cut-side down onto the pan. Roast for 30 to 35 minutes until the squash is tender when pierced through the skin with a fork and the cut sides have turned golden where they touched the pan. Set aside to cool for 10 minutes.
- While the squash roasts, cook the quinoa. Rinse it in a fine mesh strainer under cold water for 30 seconds, then add it to a medium saucepan with the vegetable broth. Bring to a boil over medium-high heat, reduce to a low simmer, cover, and cook for 15 minutes. Remove from heat and let it sit covered for 5 minutes, then fluff with a fork. The quinoa should look like it has little white rings around each grain. That means it is fully cooked.
- Make the maple-mustard dressing. In a small bowl, whisk together the maple syrup, Dijon mustard, apple cider vinegar, the remaining 2 tablespoons olive oil, cinnamon, cumin, and the remaining 1/2 teaspoon salt until fully combined and smooth.
- Once the squash is cool enough to handle, use a large spoon to scoop the flesh from the skins into a large mixing bowl. Break it into rough chunks, not a smooth puree. Some texture is good here. Add the cooked quinoa, dried cranberries, and pepitas. Pour the maple-mustard dressing over everything and fold gently to combine. Taste and add more salt if needed. Quinoa can absorb a lot of seasoning, so do not be shy here.
- Lower the oven temperature to 375 degrees F. Lightly grease a shallow 2 quart baking dish with olive oil. Spread the quinoa and squash mixture evenly into the dish and press the top gently with the back of a spoon to level it.
- Bake uncovered for 15 to 20 minutes until the edges are lightly set and the top feels dry to the touch rather than wet. The purpose of this final bake is to bring everything together and warm it through, not to cook it further. Remove from the oven and let it rest for 5 minutes. Scatter the chopped parsley or sage over the top and serve directly from the dish.
Notes
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