Making Cheesy Broccoli-and-Rice Casserole is straightforward and fun. Simply follow these steps:

1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or casserole dish.
2. Cook the rice according to package instructions. Set aside once done.
3. In a large skillet, heat olive oil or butter over medium heat. Sauté the chopped onion and minced garlic until soft and fragrant, about 3-4 minutes.
4. Add the broccoli florets to the skillet and sauté for an additional 3-4 minutes until just tender.
5. In a large mixing bowl, combine the cooked rice, sautéed broccoli mixture, cream of mushroom soup, milk, 2 cups of shredded cheese, salt, pepper, and paprika if using. Mix until everything is well combined.
6. Transfer the mixture to the greased baking dish, spreading it evenly.
7. Top with the remaining 1 cup of shredded cheese, making sure to cover the entire surface.
8. Bake in the preheated oven for 30-35 minutes or until the cheese is bubbly and golden brown.
9. Once baked, remove from the oven and let cool for about 10-15 minutes before serving.

This step-by-step guide will help you create a delicious casserole that is cheesy, savory, and utterly comforting.