Gather your ingredients.
Add 1 Tbsp vegetable oil to a large pot and heat over medium.
Add diced onion, bell pepper, and jalapeno and cook for about 5 minutes, then add the sausage.
Continue cooking the vegetables and sausage until veggies are tender and sausage is slightly brown.
Add the entire can of Rotel (do not drain).
Add 3¾ cups of water and Zatarain's rice mix, and bring to a boil. Once boiling, reduce heat, cover, and simmer for 25 minutes or until rice is tender.
While the jambalaya is boiling - in a separate pot, prepare the shrimp according to package instructions (medium heat, 10-12 minutes, flipping frequently).
During the last 5 minutes of the jambalaya boiling, add the cooked shrimp to the jambalaya. (be sure to scrape all the saucy stuff in there too - lots of flavor!) Mix well, and enjoy!