In a large bowl, combine the uncooked beef, yellow onion, chili powder, taco seasoning & adobo with cream cheese, plus one cup of the shredded cheese and mix until combined.
Spoon the mixture into uncooked manicotti shells
Arrange in a greased 13-in. x 9-in. baking dish.
Combine water and Salsa sauce; pour over the stuffed shells.
Cover and bake at 350F for 1 hour.
Uncover; spoon sour cream over the top. Sprinkle with cheese, onions and olives if desired. Bake an additional 10 minutes or so or until the cheese is melted on top
ENJOY!