Storage: Cover leftovers tightly and refrigerate for up to 3 days. Reheat in the microwave or oven.
Variations: Feel free to substitute other cheeses like cheddar or gouda. You can also add cooked bacon or ham for extra protein.
Tips: If you prefer a smoother texture, you can pulse the broccoli and onion in a food processor before sautéing. Ensure the chicken is fully cooked before adding it to the custard.