Heat a large nonstick skillet over medium-high heat. Sprinkle pork with salt and black pepper. Add oil to pan. Add pork, and sauté 4 minutes or until browned. Remove pork from pan; place in a bowl. Add onion and jalapeño to pan; sauté 5 minutes or until tender. Add broth; reduce heat, and simmer 1 minute, scraping pan to loosen browned bits. Stir in tomato; simmer 2 minutes.
Return pork and accumulated juices to pan. Stir in cilantro and lime juice; cook 1 minute or until pork is done.
Heat tortillas according to package directions. Spoon 1/2 cup pork mixture into each tortilla; roll up.
Browning the pork improves its color, and the browned bits enrich the sauce's flavor. Add more jalapeño pepper if you enjoy spicy food. Use the same pan to brown the pork and make the rave-worthy sauce.