Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions
Juicy shrimp coated in a smoky Cajun spice blend roasted alongside colorful bell peppers and onions for a simple, flavorful seafood dinner. This american-inspired seafood (gluten-free) ready in about 33 minutes pairs (peeled and deveined) large shrimp, olive oil, Cajun seasoning for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 280 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1 lb (peeled and deveined) large shrimp
- 1 large, sliced into 1/2-inch strips red bell pepper
- 1 large, sliced into 1/2-inch strips yellow bell pepper
- 1 medium, sliced into thin wedges red onion
- 3 tbsp olive oil
- 2 tbsp Cajun seasoning
- 4, for serving lemon wedges
- 2 tbsp, chopped fresh parsley
- 1 tsp salt
- 1/2 tsp black pepper
Instructions
- Step 1: Preheat oven to 425°F (220°C). On a large rimmed baking sheet, toss 1 sliced large red bell pepper, 1 sliced large yellow bell pepper, and 1 sliced medium red onion with 2 tbsp olive oil, 1 tsp salt, and 1/2 tsp black pepper. Spread in an even layer and roast for 15 minutes.
- Step 2: In a medium bowl, toss 1 lb peeled and deveined large shrimp with 1 tbsp olive oil and 2 tbsp Cajun seasoning until evenly coated.
- Step 3: Remove the baking sheet from the oven after 15 minutes, push the roasted vegetables to the sides, and arrange the spiced shrimp in the center.
- Step 4: Return the sheet to the oven and roast for 7-8 minutes until shrimp are pink and opaque, and vegetables are tender.
- Step 5: Sprinkle 2 tbsp chopped fresh parsley over the shrimp and vegetables, serve with 4 lemon wedges for squeezing over the top.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions take to make?
Total time is about 33 minutes (10 min prep + 23 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.
Can I substitute ingredients in Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Sheet Pan Cajun-Spiced Shrimp with Roasted Bell Peppers and Onions gluten-free?
Yes — this recipe is tagged gluten-free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
