• Preheat the oven to 350°F. In a large bowl, whisk together all of the ingredients until a thick batter forms.
• Grease a casserole dish with butter or cooking spray. Pour in the batter and spread it to the sides of the dish.
• Bake for 60-65 minutes or until the center of the casserole is set. Remove from the oven. Set 30 minutes at room temperature for best results (if serving right away).

FOR 24-48 HOURS IN ADVANCE:

• Cool until the casserole is no longer steaming. Cover with foil and chill for up to 2 days. Prior to serving, bring the casserole to room temperature. Reheat at 350°F for 30-40 minutes. Sprinkle on fresh parsley prior to serving.

FOR FREEZING (UP TO 6 WEEKS AHEAD):

• Cool to room temperature to prevent condensation from forming on the plastic wrap. Cover tightly in plastic wrap then wrap the entire casserole dish with foil. Freeze for up to 6 weeks. Thaw in the fridge for 24 hours then bring to room temperature prior to reheating. Reheat 350°F for 30-40 minutes. Sprinkle on fresh parsley prior to serving.