Prep: Preheat oven to 400°F. In a small bowl. Mix the salt, garlic powder, onion powder, paprika, cinnamon, and sliced sage together, then divide the seasoning mixture in half.
1 teaspoon kosher salt, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon paprika, ½ teaspoon cinnamon, 5 fresh sage leaves
Season the vegetables: Add butternut squash, cauliflower, onion, and garlic to a large, deep 9x13-inch baking/casserole dish. Toss the vegetables with olive oil and half of the seasoning mixture. Make a well in the center of the vegetables and add the rinsed quinoa.
½ large butternut squash, 1 head cauliflower, ½ onion, 3 cloves garlic, 2 teaspoons olive oil, 1 cup quinoa
Add broth and bake: Stir the remaining seasoning mixture into the broth. If using water, stir in 2 teaspoons poultry seasoning. Pour the liquid evenly over the quinoa and vegetables, making sure the quinoa is submerged. Cover tightly with a lid or foil and bake for 25 minutes.
2½ cups chicken broth or water, 2 teaspoons poultry seasoning
Cook the sausage: While the casserole is in the oven, remove the Italian chicken sausage from its casings. Heat a skillet over medium heat and add the sausage. Cook, breaking it up with a wooden spoon, for 8–10 minutes, or until browned and cooked through. Set aside.
1 lb Italian chicken sausage
Check the quinoa: Remove the lid or foil and check the quinoa. It should be nearly tender, with most of the liquid absorbed. Cooking time can vary depending on your oven and baking dish. If the quinoa is still firm or the casserole looks dry, add ¼ cup additional broth or water, cover, and bake for another 5–10 minutes.
Add remaining ingredients: Once the quinoa looks tender, stir in the chopped kale, cooked chicken sausage, drained white beans, crumbled feta, and 1 cup of shredded cheese until evenly combined. Sprinkle the remaining 1 cup of shredded cheese evenly over the top.
1 bunch lacinato kale, 1 can white beans, 4 oz feta cheese, 2 cups shredded cheese
Finish baking: Return to the oven, uncovered, and bake for 15 minutes, or until the cheese is melted and bubbly and the quinoa is fully cooked. Let the casserole rest for 5–10 minutes before serving.