1. Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish with butter or non-stick spray.
2. Prepare the broccoli by washing and cutting it into bite-sized florets. If using frozen broccoli, thaw thoroughly and pat dry to avoid soggy casserole.
3. In a large pot, bring water to a boil. Blanch the broccoli for 2-3 minutes until bright green and just tender. Drain and rinse immediately with cold water to stop cooking. Set aside.
4. In a medium skillet over medium heat, sauté the diced onion and minced garlic in a tablespoon of butter or oil until fragrant and translucent, about 4-5 minutes.
5. In a large mixing bowl, combine the sour cream, mayonnaise (or extra sour cream), milk, Dijon mustard, salt, pepper, and paprika. Stir in the sautéed onions and garlic.
6. Add 1 1/2 cups of shredded cheddar cheese to the bowl and mix well.
7. Fold in the blanched broccoli, gently coating the florets with the cheesy mixture.
8. Pour the mixture into the prepared baking dish, spreading it evenly.
9. In a small bowl, mix the crushed crackers or panko breadcrumbs with melted butter until crumbly and evenly moistened.
10. Sprinkle the buttery topping evenly over the casserole, then top with the remaining 1/2 cup shredded cheddar cheese.
11. Bake for 25-30 minutes, or until the casserole is bubbly and the topping is golden brown.
12. Remove from oven and let it sit for 5 minutes before serving. This helps the casserole set and makes it easier to scoop.

I remember the first time I made this casserole for my family—my kitchen counters were a mess, the kids were bouncing off the walls, and I almost gave up halfway through. But sticking with it paid off. The cheesy aroma filled the house, and everyone gathered around the table, plates piled high. It reminded me of the meals I loved as a kid—imperfect but full of warmth and connection.