This Cheesy Broccoli Mushroom Rice Casserole is a delicious and comforting dish that is perfect for a family dinner or potluck. It combines tender broccoli florets, sautéed mushrooms, and fluffy rice in a creamy and cheesy sauce. The casserole is baked until golden and bubbly, creating a satisfying and flavorful meal. Serve it as a main course or as a side dish alongside grilled chicken or roasted vegetables.