In a small bowl, mix all the dry seasoning ingredients. Set aside a small spoonful (about one-third) for the vegetables.
Add 1 tablespoon of olive oil and the juice of ½ lime to the remaining seasoning and stir to form a loose paste.
Pat the shrimp dry and place in a bowl. Pour the seasoning paste over the shrimp and toss to coat evenly. Set aside while you prepare the vegetables.
Toss the sliced peppers and onion with the reserved dry seasoning.
Heat a large skillet over medium-high heat. Add the shrimp in a single layer and cook for 2–3 minutes per side, or until pink and opaque. Remove from the pan and set aside.
Add the remaining 1 tablespoon olive oil to the skillet. Add the seasoned vegetables and sauté for 5–6 minutes, stirring occasionally, until softened and slightly charred.
Return the shrimp to the skillet. Toss everything together just until heated through. Taste and add an extra squeeze of lime juice if desired.
Warm the tortillas and fill with shrimp and vegetables. Add toppings like guacamole, pico de gallo, salsa roja, avocado slices, sour cream, or fresh cilantro. Serve immediately.