In a bowl, toss the shrimp with Cajun seasoning until well coated.

Heat olive oil in a skillet over medium heat. Add diced bell pepper and onion, sautéing until softened, about 5 minutes.

Add minced garlic and cook for an additional minute until fragrant.

Add the seasoned shrimp to the skillet and cook for 3-5 minutes, stirring occasionally, until shrimp are pink and opaque.

Remove from heat, squeeze fresh lemon juice over the shrimp, and garnish with chopped parsley. Serve immediately.