Mix together raw hamburger, shredded cheese (save some for topping), green chilis, and spices till thoroughly combined. Stuff meat mixture into manicotti shells.
Spray 9x13 baking dish with cooking spray and add manicotti shells. Combine Rotel and enchilada sauce. Pour over manicotti and cover with aluminum foil.
Bake at 350 degrees for approximately 50-55 minutes till meat is done and shells are soft. Top with rest of shredded cheese.