Vegetarian Breakfast Casserole with Swiss Chard and Gruyere

Swiss Chard and Gruyere Strata is a make-ahead vegetarian breakfast casserole that’s perfect for feeding a crowd. Loaded with veggies, eggs, cheese, and crusty bread, this breakfast bake soaks overnight in your fridge and bakes up in the morning. Leftovers freeze like a dream, and this is also a fantastic packed lunch.