I'm glad you dared to try this fruit @rosanna-brava, I know it as lefaria, and yes, it has a sweet taste that can be very refreshing when it's hot and it's eaten cold, previously refrigerated.
Generally the fruits of the cacti, and the cacti themselves, are sources of minerals, vitamins, microelements; in fact, in my country, Venezuela, we make a sweet with a cactus that we call "buche" (Melocactus curvispinus), which is delicious. Good discovery you have made.
Thank you for sharing your content on Plant Power (Vegan). Greetings.