Creamy Broccoli Cauliflower Quinoa Casserole
- Prabha Honrath, RD
- 2 days ago
- 3 min read
A nourishing, veggie-packed comfort dish with protein, fiber, and a creamy baked finish.
When you're craving something cozy but still want a meal that feels balanced and nourishing, this creamy broccoli cauliflower quinoa casserole is the perfect solution. It has everything you want in a comforting baked dish — a creamy base, roasted vegetables, and a golden bubbly top — but it’s built with ingredients that add real nutrition and staying power.
Instead of relying on heavy cream or processed sauces, this casserole uses a simple homemade sauce, protein-rich quinoa, white beans, and plenty of vegetables to create a satisfying meal that feels hearty without being overly rich.
Roasted broccoli adds texture and flavor, while riced cauliflower blends seamlessly into the casserole for an extra boost of vegetables. It’s a great way to use both fresh and frozen produce to build a balanced meal with minimal effort.
This dish works beautifully for weeknight dinners, meal prep, or a healthy comfort food option when you want something warm and satisfying.
Why This Recipe Works
Balanced and satisfying Quinoa and white beans add plant-based protein and fiber, making this casserole filling and nutrient-dense.
Vegetable-forward: Broccoli, carrots, onion, and cauliflower create flavor, texture, and color.
Creamy but lighter: Greek yogurt and a modest amount of cheese provide richness without making the dish overly heavy.
Great for leftovers: This casserole reheats well, making it ideal for meal prep lunches or easy dinners throughout the week.
Ingredients
Roasted Vegetables
3 cups broccoli florets
1 cup frozen riced cauliflower
1 tablespoon olive oil
½ teaspoon garlic powder
¼ teaspoon black pepper
Quinoa
1 cup quinoa, rinsed
2 cups chicken broth or vegetable broth
Creamy Sauce
1 tablespoon olive oil or butter
1 small yellow onion, diced
2 medium carrots, diced
3 cloves garlic, minced
1 teaspoon salt
¼ teaspoon black pepper
2 tablespoons flour
1 cup chicken broth
1 cup milk
1 teaspoon dried oregano
¼ teaspoon cayenne pepper (optional)
Add-Ins
1 can (15 oz) white beans, drained and rinsed
½ cup plain Greek yogurt
1 cup shredded cheese (cheddar, mozzarella, or a blend)
Instructions
Roast the vegetables
Preheat the oven to 400°F.
Toss broccoli florets with olive oil, garlic powder, and black pepper. Spread onto a baking sheet and roast for 12–15 minutes, until the edges begin to brown.
Halfway through roasting, add the frozen riced cauliflower to the pan and continue roasting. This adds extra vegetables and blends seamlessly into the casserole.
Set aside once roasted and turn down the oven to 350°F.
Cook the quinoa
Combine quinoa and broth in a saucepan. Bring to a boil, then reduce to a simmer and cover.
Cook for 12–15 minutes until the liquid is absorbed. Fluff with a fork and set aside.
Cooking quinoa in broth instead of water adds extra flavor to the finished casserole.
Prepare the creamy sauce
Heat olive oil in a large skillet over medium heat.
Add onion and carrots and cook for about 5 minutes, until softened.
Add garlic, salt, and pepper and cook for 30 seconds, just until fragrant.
Sprinkle the flour over the vegetables and stir continuously for 30–60 seconds until lightly golden.
Build the sauce
Slowly whisk in the chicken broth to prevent lumps.
Gradually add the milk, whisking continuously. Bring the mixture to a gentle simmer and cook for about 5 minutes until the sauce thickens slightly.
Stir in oregano and cayenne pepper.
Assemble the casserole
Remove the sauce from heat and stir in:
cooked quinoa
white beans
roasted broccoli and cauliflower
Fold in the Greek yogurt and shredded cheese until well combined. Taste and adjust seasoning if needed.
Bake
Transfer the mixture to a greased baking dish.
Bake at 350°F for 15 minutes until bubbly.
Broil for 3–4 minutes to lightly crisp the cheesy top.
Serving Suggestions
This casserole can easily stand alone as a complete meal, but it also pairs well with:
a simple lemon vinaigrette salad
roasted green beans or asparagus
grilled chicken or salmon for additional protein
Storage Tips
Refrigerate leftovers in an airtight container for up to 4 days.
Reheat in the microwave or oven with a splash of milk to maintain the creamy texture.
This casserole can also be frozen for up to 2 months for easy future meals.
Easy Recipe Variations for Broccoli Cauliflower Quinoa Casserole
Add extra protein
shredded rotisserie chicken
cooked ground turkey
Swap the grains
brown rice
farro
barley
Change the vegetables
mushrooms
zucchini
spinach stirred in before baking
Nutrition Facts
Calories: 340 kcals
Total Fat: 12 g
Saturated Fat: 4 g
Sodium: 620 mg
Total Carbohydrates: 42 g
Fiber: 8 g
Protein: 18g
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