sliced pork in to long half inch thick strips. place in a bowl with zest, half the lime juice, garlic, salt, cayenne, black pepper, and 2 teaspoons oil, toss to coat. Marinate at room temp 20 minutes or longer in refrigerator

heat 2 tablespoons oil in a wok ( or 12 inch non stick skillet ) over medium high heat. the bell peppers onions and jalapeños; stir fry onions and peppers are soft and slightly charred 6 to 8 minutes. transfer to a metal bowl and toss with cilantro and remaining lime juice; cover with foil and keep warm

add the remaining 2 teaspoons oil and the pork; stir fry untill meat is seared and cook through.