Methods/steps
After spines are removed, cut off tuna ends and cut in half. Scrape or peel out the inside of the tuna and remove seeds if possible. If not, you can leave the seeds. Place in a bowl. Bring the water to a boil then remove from heat and pour over tuna. Cover and let steep at least 2–3 hours. Stir and mash fruits occasionally to release the good juices. Strain off pulp and seeds, add sugar and lime juice. Serve over ice for a refreshing drink or use as the base for your homemade margaritas.