Heat a large skillet or saute pan on medium heat and add olive oil.
In another pot, boil thin spaghetti noodles per the box instructions. Drain and lightly toss with olive oil. Keep in the strainer.
Once the skillet is warm, add onions and red bell pepper to the skillet and cook for 10 minutes, stirring often.
Add in the roasted garlic cloves, butter, salad shrimp, basil, parsley, salt and pepper to the skillet. Cover completely and let cook for 5-7 minutes, still on medium heat. Stir every 2 minutes.
Turn fire to medium low. Add in the thin spaghetti noodles and toss to coat. Add in an additional tablespoon of salted butter if desired and add in parmesan cheese.
Turn fire to lowest setting, cover completely and let the pasta warm for 5 minutes.
Serve and top with more parmesan cheese and black pepper if desired!