Place cactus and a piece of 1/4 onion in a large pot. Cover with water and add salt to taste.
1 lb prickly pear cactus pads, thorns removed, rinsed and cut into cubes (~ 4 cups cut up), 3/4 medium onion, divided
Bring the mixture to a boil, partially covered, and cook the cactus until fork-tender, about 10-15 minutes.
Remove the onion, and drain the cactus. Rinse thoroughly under running water to stop the cooking and remove the viscous liquid from the cactus.
Combine the cactus, tomatoes, chopped onion, and cilantro or oregano (if using) in a bowl. Mix thoroughly.
1 lb prickly pear cactus pads, thorns removed, rinsed and cut into cubes (~ 4 cups cut up), 3 medium Roma tomatoes, seeded and diced, 3/4 medium onion, divided, chopped cilantro or dried oregano to taste (optional)
Add in lime juice and salt to taste. Mix again
juice of 1 lime, Salt to taste
Allow this to cool to room temperature and serve.