This Whole30 tuna zoodle casserole is a rich, creamy, healthy take on the American classic. With zoodle ribbons, a cashew "béchamel," golden brown sautéed mushrooms, and savory chunk tuna, you'll want to add this Whole30 tuna zoodle casserole to your Whole30 dinner recipe rotation ASAP.
Pour sauce over sautéed mushrooms and stir to combine well. Add prepared zucchini noodles and drained tuna to sauce and combine well. Transfer to baking dish and bake for 10 minutes.
Broil for a couple minutes at the end to brown top, if desired.