Oven-Baked Chicken and Broccoli Casserole with Cauliflower Rice
A wholesome Whole30 casserole featuring tender roasted chicken, crisp broccoli, and fragrant cauliflower rice baked to perfection. This American-inspired Whole30 recipe (gluten free), ready in about 45 minutes, pairs boneless skinless chicken thighs, broccoli florets, cauliflower rice for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1.5 pounds boneless skinless chicken thighs
- 3 cups broccoli florets
- 2 cups cauliflower rice
- 3 tablespoons olive oil
- 3 garlic cloves, minced
- 1 medium yellow onion, diced
- 2 tablespoons coconut aminos
- 1 cup chicken broth
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 teaspoon dried thyme
The 9x13 baking dish we’d bake this in → Best Bakeware for 2026: Top Picks + Buying Guide
Affiliate disclosure: AislePrompt may earn a commission on qualifying purchases made through Amazon links, at no additional cost to you. See our policy →
Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: Preheat oven to 375°F. Cut 1.5 pounds boneless skinless chicken thighs into 1-inch pieces and toss with 1 teaspoon salt, 1/2 teaspoon black pepper, and 1 teaspoon dried thyme.
- Step 2: Heat 2 tablespoons olive oil in a large skillet over medium-high heat. Add 3 cloves minced garlic and 1 medium diced yellow onion, sauté for 2-3 minutes until fragrant and translucent.
- Step 3: Add chicken pieces to the skillet and brown for 4-5 minutes, stirring occasionally until edges are golden but chicken is not fully cooked.
- Step 4: Stir in 3 cups broccoli florets and 2 cups cauliflower rice, sautéing for 3 minutes until broccoli is crisp-tender.
- Step 5: Pour in 1 cup chicken broth and 2 tablespoons coconut aminos, stirring to combine and deglaze the pan.
- Step 6: Transfer everything to a greased 9x13 inch baking dish and drizzle remaining 1 tablespoon olive oil on top.
- Step 7: Bake uncovered for 20-25 minutes until chicken is cooked through and casserole is bubbling.
- Step 8: Remove from oven and let rest for 5 minutes before serving to allow flavors to meld.







