Gluten Free Spaghetti Squash Tuna Casserole

Total time1 hr 35 min

Prep time20 min

Cook time1 hr 15 min

Gluten Free Spaghetti Squash Tuna Casserole

Tender roasted spaghetti squash stands in for pasta here, its long golden strands soaking up a creamy, savory sauce built from leeks, cremini mushrooms, and a warm blend of turmeric and ginger. The sauce itself gets its body from full-fat coconut milk and rich bone broth, thickened to a glossy, spoon-coating consistency and brightened with a splash of coconut aminos and apple cider vinegar. Flaky tuna folds right in, turning the whole thing into a hearty, comforting casserole that bakes up bubbling at the edges with a lightly golden top. It's the kind of cozy, old-school casserole flavor you crave, rebuilt around vegetables instead of noodles. A scatter of fresh parsley at the end adds a clean, herby finish. This one's a great pick for a gluten free dinner rotation, especially on nights when you want something warm, creamy, and satisfying without any fuss.

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Ingredients

4 servings

For the squash

1 medium spaghetti squash (about 3 lb)
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1 tbsp olive oil
½ tsp salt

For the sauce

2 tbsp olive oil
2 medium leeks, white and light-green parts only, thinly sliced
3 cloves garlic, minced
8 oz cremini mushrooms, thinly sliced
1 tsp dried thyme
½ tsp dried oregano
½ tsp ground turmeric
¼ tsp ground ginger
2 tbsp arrowroot starch
1 can (13.5 oz) full-fat coconut milk
1 cup bone broth
1 tbsp coconut aminos
1 tbsp apple cider vinegar
¾ tsp salt

For the casserole

2 cans (5 oz each) tuna packed in water, drained

For serving

2 tbsp fresh parsley, chopped (optional)

Instructions

1
Preheat the oven to 400°F (205°C). Place the spaghetti squash halves cut-side up on a rimmed baking sheet, brush with 1 tbsp olive oil, and sprinkle with 1/2 tsp salt. Roast for 40–45 minutes, until the flesh is tender and a fork slides through the strands with no resistance.
2
Let the squash cool for 10 minutes, then use a fork to scrape the flesh into long strands. Transfer the strands to a colander and press gently with a clean kitchen towel to remove excess moisture. Set aside.

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