In a large saucepan over medium heat, ADD chicken broth and chopped onion; SIMMER until onion is tender, about 10 minutes.
ADD bow tie pasta; let BOIL until pasta is "al dente."
ADD fresh spinach; return to BOIL; ADD cubed chicken; let BOIL for 5 minutes.
Top each serving with chopped fresh tomato.
Per Serving (excluding unknown items): 133 Calories; 2g Fat (11.7% calories from fat); 8g Protein; 21g Carbohydrate; 2g Dietary Fiber; 0mg Cholesterol; 583mg Sodium. Exchanges: 1/2 Lean Meat; 1/2 Vegetable.