Preheat oven to 425°F. Lightly oil a baking sheet.
Place bell peppers, onion and garlic in a single layer onto the prepared baking sheet. Stir in
2 Tbsp. olive oil and 1 Tbsp. Karns Fajita seasoning; gently toss to combine.
Place into oven and bake for 10 minutes, or until the vegetables are beginning to soften.
In a large bowl, combine shrimp, 1 Tbsp. olive oil, and 1 Tbsp. Karns Fajita seasoning.
Move cooked vegetables onto one side of the baking sheet. Place shrimp onto the opposite side of the baking sheet in a single layer.
Return baking sheet to oven and bake just until shrimp are pink, firm and cooked through, an additional 6-8 minutes. Stir in cilantro and lime juice.
Serve on warmed tortillas.