Souvlaki, the way the Greeks make it. Greeks eat a lot of this stuff - it's the Greek hot dog or hamburger, like Gyros.
Marinate your pork cubes or slices, preferably overnight. You can add some bell pepper chunks for the skewers. Cook on charcoal grill with salt and pepper. (Sometimes people use lamb, chicken, or swordfish instead of pork.)
Serve on Pita roll or in a pita pocket with a little chopped lettuce, chopped tomato, chopped raw red onion if you want and even pickled hot peppers, and all topped with generous globs of Tzatziki Sauce.
(While on the topic of Tzatziki, I should mention that I believe it to be the best sauce that exists for poached fish, especially poached salmon. Baked salmon, too.)
Taco, gyro, burger, pizza, falafel, sushi, noodle soup, pho, bigalla, poutine, jerk chicken, covrigi, satay - all fast food and street food is good stuff around the world. Cheap and delicious.