- Have your pasta cooked and keep warm. 
- Heat butter and olive oil over medium- high heat in a medium skillet. 
- Season the shrimp with Old Bay Seasoning and place in skillet. 
- Add the garlic and cook the shrimp on both sides until pink. 
- Take care not to let the garlic burn. Remove shrimp and garlic to a small bowl or plate. 
- Add sliced peppers and onions seasoning with a bit of Old Bay Seasoning. 
- Saute the vegetables over medium-high heat for about 5 minutes. You want the peppers to be tender-crisp, not mushy. 
- Next add the half-and-half and Parmesan cheese. Turn down heat to medium and simmer for about 5 minutes. The sauce will thicken some as it cooks. 
- Add shrimp and garlic back to the skillet and continue to simmer for about 4-5 more minutes. 
- Taste sauce to see if you need to add more seasoning or salt and pepper to your tastes. 
- I just use the Old Bay seasoning and sometimes I will add more if needed. 
- At this point, add cooked pasta, stirring to coat pasta with sauce. The sauce just coats the mixture, it will not be "puddling" like a normal Alfredo or marinara sauce would be 
- Add a sprinkling of shredded Parm and serve.