Make ahead! Once the bread and fillings have been tossed with the egg mixture, this can be covered and set in the fridge overnight. It’s a great option for when you want to prep the night before and then pop it in the oven first thing in the morning.
Cover leftovers tightly with plastic wrap or transfer them to an airtight container before storing them in the refrigerator for up to 3 days. Reheat individual portions in the microwave for 45-60 seconds, or reheat the entire strata in the oven at 350 degrees Fahrenheit for 10-15 minutes, until it is warmed through to 165 degrees Fahrenheit.