Heat a medium sized pan with salted water until it reaches the boiling point. Add nopales and cook for 5 minutes. Drain the water and let cool.
Heat frying pan, when hot add oil, garlic, onion, guajillos, and roasted red pepper. Saute for a few seconds, add nopales and cilantro, and season with salt and pepper.
Skewer the prawns with lemongrass and either saute or grill them. Using a round mold, place the mixture of nopales in the center of a dish and press it with a spoon to form the timbale. Decorate plates with balsamic syrup and cilantro oil, and garnish with carmelized onion, sun-dried tomatoes, and chili oil.