MIX dressing and garlic in large saucepan; cook on medium-high heat 1 min., stirring occasionally. Gradually add broth and water, stirring until well blended. Add chicken. Bring to boil. Reduce heat to medium-low; simmer 20 min. or until chicken is cooked through (165°F). Remove chicken from broth mixture; cool slightly. Pour broth through a fine-mesh strainer; return broth to pan.
SHRED chicken; return to pan. Stir in tomato sauce. Cook on medium-high heat until heated through, stirring occasionally.
LADLE soup into eight soup bowls. Serve topped with remaining ingredients.
