Hi Maria,

Thanks for reaching out! If you don’t have cumin, you can try using an equal amount of ground coriander as a substitute. Although the flavor isn’t exactly the same, it should work nicely in the seasoning mix.

For the celery salt, you can make a quick substitute by mixing a pinch of ground celery seed with a little extra salt. If you have celery seeds, roughly combine about 1/8 teaspoon of ground celery seed with 1/8 teaspoon of salt to mimic the celery salt flavor. If you don’t have celery seeds at all, simply adjust the salt to taste.

Happy cooking, and I hope you enjoy your blackened tuna!