Avocado makes better mayo-free tuna salad than Greek yogurt.

Yes, you can substitute either Greek yogurt or avocado for mayo in tuna salad — and avocado is the better option.

Greek yogurt works in a pinch, but it brings a tang that clashes with tuna unless you load up on lemon, salt, and pepper. It also tends to be drier than mayo or avocado, so you’ll want to add a splash of olive oil or even the tuna juice to keep it from feeling like wet sawdust.

Avocado is the natural swap. It gives you the same creamy fat content as mayo without the dairy tang. Mash half a ripe avocado into a can of drained tuna, add a squeeze of lemon, salt, pepper, and maybe some diced celery or red onion. That’s it. It holds up better and actually complements the tuna.

Greek yogurt is fine if that’s all you have. Avocado is what you reach for next time.