In a large saucepan add all ingredients (butter, garlic, stock cube, paprika, pepper, Sazon) and simmer until butter and stock cube are melted. (You will have to stir so that everything melts).
In the meantime, in a larger pot, bring linguine to a boil. (cook about 15-20 minutes).
Once mixture has melted, put salmon in and simmer until salmon is cooked on both sides.
Add the shrimp and bring heat down to low, cover pan and let simmer for about 10 minutes (until pasta is done).
Drain the pasta (you can reserve the pasta water,as you will have to fill the Alfredo jar with water). Add everything from the saucepan into the pasta.
Empty the jar of Alfredo sauce and halfway up again with water (you can use the pasta water, or put clean water-makes no difference).
Bring to a boil and let simmer for about 5-10 minutes so all the ingredients come together.
Serve with Garlic bread! DELICIOUS!
*Depending on what consistency of the sauce you like, you can use two jars of Alfredo sauce, and fill one jar with water.