Peel and devein shrimp. Rinse them off, season with a little bit of salt, and set aside.
Preheat a large cooking pan over medium heat.
Add oil to the pan and saute thinly sliced onions and peppers until soft. I like to saute until onions start to get golden brown, it gives the dish more flavor.
Add diced tomatoes and minced garlic. Mix and cook for a couple of minutes. Season with some salt.
Slice sausage thinly and add it to the veggies. Mix and cook for about 5 minutes.
Heat up stock in a microwave and mix it with tomato paste, Cajun seasoning, and paprika. Raise heat, pour warm broth mixture into the pan with veggies and bring it to boil.
Once it starts to boil, add quinoa to the pan and stir. Lower the heat to medium, cover and cook until quinoa is just done. Stir occasionally. It should take 10-12 minutes. Taste to see if you need more salt or if you want to spice it up with more Cajun seasoning.
Add shrimp to the pan and cook just until shrimp is cooked and turned opaque on both sides. (Time will depend on the size of shrimp.)