1: Step 1: Choose lean ground beef for a healthier casserole.

2: Step 2: Load up on veggies like bell peppers and carrots.

3: Step 3: Opt for whole grain pasta for added fiber.

4: Step 4: Use low-fat cheese to cut down on calories.

5: Mix in herbs and spices for flavor without added salt.

6: Substitute Greek yogurt for sour cream for a lighter sauce.

7: Try layering with thinly sliced sweet potatoes instead of traditional noodles.

8: Bulk up your casserole with beans for added protein and fiber.

9: Experiment with different toppings like crushed nuts or breadcrumbs for added crunch.