For an extra layer of flavor, consider adding a splash of dry sherry to the sauce. Feel free to experiment with different types of cheese in the sauce. Gruyere or Fontina would be delicious! If you're not a fan of peas, you can substitute them with other vegetables like green beans or corn. Make sure to drain the tuna really well, otherwise the casserole might be too soggy. The casserole can be assembled ahead of time and stored in the refrigerator for up to 24 hours before baking. Just add a few extra minutes to the baking time.
Justyn Rogahn
Feb 10, 2025I added some sauteed mushrooms to the onion mixture and it was amazing!
Clair Tremblay
Sep 5, 2024The topping is what really sets this casserole apart. So crispy and flavorful!
Jaycee Ondricka
Jun 28, 2024I've made this recipe several times now and it's always a hit. Thanks for sharing!
Geovany Kessler
Feb 2, 2024This recipe is a game-changer! The homemade sauce is so much better than using canned soup.
Agustin Hamill
Jan 26, 2023My family loved this! Even my picky eater asked for seconds.