Heat oil in pan over medium low heat, add tomatoes and garlic, sauté for 2 minutes
Add 2 cups water, simmer for 20-40 minutes
Add fish filets and parsley sprigs, cook to desired doneness, roughly 10 minutes
Divide spinach between two bowls, place fish on top
Reduce sauce, and serve over fish, or add pasta, cooking until al dente, and serve alongside fish