1. Preheat oven to 350°F (175°C) and grease a 9×13-inch dish.
2. Boil vegetables for 5 minutes, then drain.
3. Mix sour cream, soup, milk, seasonings, garlic, and onion.
4. Combine with veggies and spread in dish.
5. Top with cheeses and breadcrumb mixture.
6. Bake for 25-30 minutes until golden and bubbly.

Serve up this cheesy vegetable casserole and watch it disappear—each bite is a cozy, flavorful treat. Dig in and enjoy!