Course: Breakfast, brunch
Cuisine: American, French
Keyword: eggs, eggs, breakfast, cassarole, gluten free, keto
Make ahead and let cool completely (which takes longer than you think!) and refrigerate. If frozen, defrost 1-2 days before reheating slowly in the fridge. Reheat at 325°F until the internal temperature reaches 300°F. If heating only one slice, the air fryer setting of reheat works well at 275°F for "about" 8 minutes (every fryer is different).