Preheat oven to 450 degrees
Mix fajita seasoning and olive oil together in a large bowl
Add shrimp and toss to coat
Lay out seasoned shrimp in a single layer on a baking sheet
Add red and yellow peppers, onion, and jalapeno, mix with shrimp and spread out evenly
Roast in a pre heated oven until shrimp are opaque, 8-10 min
Transfer shrimp to a serving plate
Broil pepper mixture until lightly blackened, 2-3 min
Transfer to the serving plate with the shrimp
Serve with tortillas, cilantro, guacamole, sour cream, whatever you like