Heat olive oil in a skillet over medium-high heat. Add diced onion and bell pepper, sauté until softened.

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

Add the shrimp and Cajun seasoning to the skillet. Cook until shrimp are pink and opaque, about 3-5 minutes.

Remove from heat and garnish with fresh parsley. Serve with lemon wedges.