2 Tbsp olive oil
1 cup diced yellow onion
2 1/2 cups peeled, sliced carrot(s)
2 cups chopped celery
1 cup chopped mushrooms
1 lb boneless, skinless, chicken breast
1 qt reduced sodium chicken broth
1 cup packed, chopped baby spinach
1 Tbsp parsley
1 1/2 cups cooked brown rice
2 tsp fresh lemon juice