
This easy yellow squash casserole recipe has layers of roasted summer squash and creamy homemade cheese sauce. Just 5 ingredients!
Preheat the oven to 400 degrees F (204 degrees C). Line a baking sheet with parchment paper.
In a large bowl, toss the slices in the olive oil, 1/2 teaspoon sea salt, and 1/4 teaspoon black pepper.
Place the squash slices in a single layer on the lined baking sheet. Roast for 10-12 minutes, until tender.
Layer the roasted squash in a 9x13 baking dish.
In a medium saucepan, combine 2 1/4 cups cheddar cheese, heavy cream, garlic, 1/4 teaspoon sea salt, and 1/8 teaspoon pepper and heat over medium heat, until melted and smooth.
Pour the sauce over the squash and sprinkle the remaining 1/2 cup cheddar cheese on top.
Bake for 20-25 minutes until the casserole starts to bubble. Switch to broil for 2-3 minutes until the cheese is golden to your liking.