In a mixing bowl, combine the shrimp, Cajun seasoning, and olive oil. Toss until the shrimp are evenly coated.
Heat a skillet over medium-high heat. Once hot, add the seasoned shrimp to the skillet. Cook for about 2-3 minutes on each side, or until the shrimp turn pink and opaque. Remove from heat.
In a separate bowl, prepare the slaw by mixing together the green cabbage, red cabbage, grated carrots, cilantro, jalapeño (if using), lime juice, and a pinch of salt. Toss well to combine.
Warm the tortillas in a dry skillet or directly over a gas flame for a few seconds on each side until they are pliable.
To assemble the tacos, place a few shrimp on each tortilla and top generously with the zesty slaw.
Serve immediately, garnished with extra lime wedges and cilantro if desired.
Notes
Serve with extra lime wedges and cilantro for garnish.