**Season the Shrimp:**
- In a mixing bowl, toss the shrimp with Cajun seasoning until evenly coated.
**Cook the Shrimp:**
- Heat olive oil in a large skillet over medium-high heat. Add shrimp and cook for 2-3 minutes per side, until they turn pink and are just cooked through. Remove the shrimp from the skillet and set aside.
**Make the Sauce:**
- In the same skillet, add butter and melt over medium heat. Add garlic and sauté for 1 minute until fragrant.
- Stir in chicken broth (or white wine), lemon juice, and red pepper flakes (if using). Let the sauce simmer for 2-3 minutes, allowing the flavors to meld.
**Combine:**
- Return the cooked shrimp to the skillet and toss to coat them in the sauce. Cook for 1-2 minutes until heated through.
**Add Pasta (if using):**
- If serving with pasta, toss the cooked linguine or spaghetti in the skillet with the shrimp and sauce. Mix well to combine.