Preheat oven to 350°F. Mix water, tomato sauce and Sauce Mix in medium saucepan. Bring to boil. Reduce heat to low; simmer 5 minutes or until thickened, stirring occasionally. Set aside.
Meanwhile, brown beef in medium skillet on medium-high heat. Drain fat. Stir 1/2 cup sauce into meat.
Dip tortillas into sauce to coat. Spoon about 1/4 cup meat filling onto each tortilla. Roll tortillas tightly. Place seam-side down in lightly greased 11x7-inch baking dish. Pour remaining sauce over enchiladas. Sprinkle with cheese.
Bake 15 minutes or until sauce is bubbly and cheese is melted.