If the frozen casserole is in a glass container, check that the manufacturer instructions say it's safe to put in the oven while cold. If not, or if you're unsure, carefully transfer the frozen casserole into an oven-safe baking dish.
Preheat the oven to 350 degrees Fahrenheit.
Place the casserole in the oven and heat until it reaches an internal temperature of 165 degrees Fahrenheit. (You can check the temperature with a meat thermometer.)
Remove the casserole once it's hot. Dinner is served!
- “The Everything Freezer Meals Cookbook (Everything Series)”; Candace Anderson and Nicole Cormier; 2010
- “Don't Panic - Dinner's in the Freezer: Great-Tasting Meals You Can Make Ahead”; Susie Martinez, Bonnie Garcia and Vanda Howell; 2005
- National Center for Home Food Preservation: General Freezing Information: Thawing and Preparing Foods for Serving
- National Center for Home Food Preservation: General Freezing Information: Freezing Pointers