Spaghetti with Chicken & Spinach

This is my own take on spaghetti - my attempt to make a healthier version.

1/2 c. chopped onion
1-2 tbsp. olive oil
1 lb. extra lean ground chicken (or turkey)
1 tbsp. flour
1 small can tomato sauce
1 can chicken broth (or a cup of homemade stock)
1 bunch fresh spinach, chopped
1 c. sliced mushrooms
1 c. chopped red bell pepper
1 tsp. each oregano & basil
salt & pepper to taste
whole wheat spaghetti, cooked & drained

Heat oil and onion; add chicken and scramble-fry until meat is fully cooked. Sprinkle meat with flour and stir to coat. Add tomato sauce, broth, veggies and seasonings; cook stirring occasionally until veggies are tender and sauce thickens. Serve over spaghetti.