For the grilled cactus leaves: Heat a cast-iron pan over high heat. Put the salt directly on the pan and grill the cactus leaves until golden brown on both sides, about 5 minutes. Dice 1 cactus leaf and reserve for garnish.
For the aguachile: In a blender, blend the choconostle, lime juice, cucumber and chile to a coarse puree. Season with salt and pepper. Set aside. To assemble the dish, divide the cactus leaves among 4 plates. Lay the shrimp on the cactus leaves and top with the aguachile. Garnish with pomegranate seeds and diced grilled cactus leaves.
Choconostle is a small, acidic and slightly sweet fruit shaped like a lychee. You can substitute with Asian pears, mango or honeydew. You can also skip it completely and add herbs like cilantro, chives and parsley. Cactus leaves tastes like cucumbers and lime. If you cannot find it, you can still serve the shrimp aguachile without the cactus leaves.
Consumption of raw or undercooked eggs, shellfish and meat may increase the risk of foodborne illness.