- Bring a large pot of water to a boil. Cook pasta until just tender, 8 to 10 minutes or according to package directions. Drain. 
- Meanwhile, heat oil in a Dutch oven over medium heat. Add bacon and cook, stirring occasionally about 2 minutes. Add shrimp, bell pepper, garlic, Cajun seasoning and pepper. Cook stirring, until the bell pepper is beginning to soften, about 3-4 minutes. Cook shrimp until it is opaque. 
- Add tomatoes and their juice; bring to a simmer. Cook, stirring often, until the sauce is bubbling and reduce until thickened.  
- Remove from the heat and stir in Amazin Mayo. 
- Add chopped onions to a bowl and heat in microwave 2-3 minutes. You may add a little bit of water to help steam them. Once heated drain water. 
- Stir the pasta and onion into the sauce. Serve sprinkled with scallions, if desired. 
- Recipe and photo courtesy of eatingwell.com