Heat the oil in a large pan over high heat. Add the peppers and onions to the pan and cook, stirring occasionally, until vegetables are tender and charred on the edges. Season the vegetables with salt and pepper.
In a small bowl. mix together the chili powder, cumin, garlic powder, onion powder, smoked paprika, and salt and pepper to taste.
Cook for 4-5 minutes or until shrimp are pink and opaque
Sprinkle the cilantro over the top and serve. Garnish withlime wedges if desired. Serve the flour tortillas and toppings on the side andhave everyone assemble their own fajitas.