Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In a small bowl roll beef strips in the taco seasoning until coated. In a large skillet over medium heat, warm olive oil. Saute beef and garlic until beef is no longer pink; about 4 minutes. Remove with a slotted spoon and set aside.
Mix together in skillet the cooked pasta, black beans, salsa and water; cook for 4 to 5 minutes. Combine with beef in a large bowl and serve sprinkled with cilantro.
1 (8 ounce) package rotini pasta
1 tablespoon olive oil
1?½ pounds top round steak, cut into 1/4 inch strips