Broccoli Cauliflower Casserole

Name: Broccoli Cauliflower Casserole
Ingredients: 1 cauliflower head; 1 large broccoli head; 1/2 cup (1 stick) butter; 1 medium onion, diced; 2 garlic cloves, minced; 1/4 cup all-purpose flour; 2 1/2 cups low-sodium chicken broth; 4 ounces cream cheese, at room temperature; 1/4 teaspoon seasoned salt, more to taste; Kosher salt and black pepper to taste; 1/4 teaspoon paprika, plus more for sprinkling; 1/3 cup seasoned breadcrumbs; 1 1/2 cups grated Monterey Jack cheese