Chicken, broccoli, and cheese baked until bubbly — no pasta, no rice needed. This low carb casserole is family comfort food without the carb load.
Preheat oven to 400°F. Grease a 9x13-inch baking dish with olive oil to prevent sticking.
Cut chicken breast into bite-sized pieces. Season with salt, black pepper, garlic powder, and onion powder. Toss until coated evenly.
Steam broccoli florets for 3 minutes until just bright green — do not overcook. Drain immediately and set aside.
In a large nonstick skillet, heat olive oil over medium-high. Add chicken pieces and sauté 5-6 minutes until browned and cooked through, stirring occasionally.
In a large bowl, mix cooked chicken, steamed broccoli, sour cream, and half of the shredded cheddar cheese. Spread evenly into prepared baking dish.
Top casserole with remaining cheddar cheese. Bake uncovered for 15-18 minutes until top is bubbly and golden brown. Let rest 5 minutes before serving to allow cheese to set.