Creamy Basil Spinach Zucchini Soup

taken from melskitchencafe
1 T olive oil
1 garlic clove minced
1 onion chopped (or 1 large leek or 2 med white parts only chopped)
2 med zucchini chopped
1 t. salt
1/2 tsp pepper
1 can chicken broth
2 T fresh basil
2-3 c. fresh spinach chopped
1-2 c. cooked chicken (optional)

Heat olive oil and add garlic, onions, and zucchini.  Add salt and pepper.  Cook until onions are soft.  Add 1 c. of broth and cover and cook until zucchini is falling apart and soft.  Transfer to blender and blend until smooth.  Pour back into pot and stir in remaining broth and chopped spinach and chicken.  Warm until heated through.