Keep shredded hashbrowns frozen when adding to prevent mushiness and overcooking., Drain browned beef well to avoid a greasy casserole; lean ground beef or turkey can reduce fat., Use low-sodium cheddar cheese soup or reduce taco seasoning to lower sodium., Avoid lifting the slow cooker lid during cooking to maintain time and temperature., If casserole is runny at the end, stir in cream cheese or extra shredded cheese to thicken., To get a crispy top without broiler, transfer to baking dish and broil until golden., Make-ahead tip: Assemble and refrigerate for up to 24 hours before cooking; add extra cook time if cooking from cold., Can swap ground beef with cooked shredded chicken, ground turkey, or add black beans and corn for a meatless option., Add diced green chiles or jalapeños for spiciness., Sprinkle crushed tortilla chips or Doritos before serving for added crunch.