Here's a couple recipes I found. I've never tried them.
*crudites st. pierre*
slice raw, peeled cactus into sticks. eat like "bitter cucumber spears". add salt, lime-juice and chopped cilantro to taste. this is, so far, my method of choice, partly because it is so minimalist.
*ensalada de nopalitos*
to each 4 oz of peeled, chopped raw cactus add 2 Tbs good-quality cider vinegar, and let stand in the refrigerator for at least an hour. add chopped parsely to taste. this is the second-best tasting recipe.
*nopales asados*
fry raw, peeled cactus strips in extra-virgin olive oil over medium- high heat, until the sharp edges brown, and small golden-brown blisters rise up on the faces. this ties for second best-tasting. the white tissue, in particular, has an underlying quality of sweetness that is brought out by frying, and the contrast of the crispness with the now-gelatinous interior is rather nice. serve lightly salted.
*nopales al vapor*
to 1 2/3 C peeled, trimmed, and chopped fresh cactus add 1 Tbs chopped scallions, a minced clove of garlic and salt to taste. fry in 1 Tbs olive oil, covered, over low-medium heat for 10 min. shake the pan from time to keep the cactus from sticking. when the juice has started to flow, uncover the pan and cook for an additional 15 minutes, until the juice has evaporated some, the residue has begun to resorb, and the cactus is lightly browned. scrape the pan with a wooden spoon to prevent sticking. yield 1/2 C.
Enjoy!!