Cajun-Spiced Shrimp with Sautéed Bell Peppers and Onions

By AislePrompt Editorial · Published 2026-08-07 · Updated 2026-08-07

A bold and spicy shrimp dish featuring Cajun seasoning with sweet bell peppers and onions, sautéed to perfection for a vibrant, low-carb meal. This American-inspired seafood recipe (whole30, low carb), ready in about 25 minutes, pairs large shrimp, peeled and deveined, yellow onion, sliced into thin strips, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 250 calories and feeds 4, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. 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 large shrimp, peeled and deveined
• 1 medium red bell pepper, sliced into 1/2-inch strips
• 1 medium yellow bell pepper, sliced into 1/2-inch strips
• 1 medium yellow onion, sliced into thin strips
• 2 tbsp olive oil
• 1 tbsp Cajun seasoning
• 1 tsp garlic powder
• 1/2 tsp sea salt
• 1/4 tsp black pepper
• 2 tbsp fresh parsley, chopped
• for serving lemon wedges

The pan we’d use for this → Best Nonstick Cookware for 2026: Top 5 Skillet Picks + Buying Guide

Instructions

1. Step 1: In a medium bowl, toss 1 lb large shrimp with 1 tbsp Cajun seasoning, 1 tsp garlic powder, 1/2 tsp sea salt, and 1/4 tsp black pepper until evenly coated.
2. Step 2: Heat 2 tbsp olive oil in a large skillet over medium-high heat. Add 1 sliced yellow onion, 1 sliced red bell pepper, and 1 sliced yellow bell pepper. Sauté for 5-6 minutes until vegetables are tender and slightly caramelized.
3. Step 3: Push vegetables to the side of the skillet and add the spiced shrimp in a single layer. Cook shrimp for 2-3 minutes per side until pink and opaque.
4. Step 4: Stir the shrimp and vegetables together, sprinkle with 2 tbsp chopped fresh parsley, and cook for an additional minute to combine flavors.
5. Step 5: Serve immediately with lemon wedges on the side for squeezing.