Spinach and rice soup

• 10 oz pkg of frozen spinach
• 1 C basmati rice
• 8 cups of vegetable broth (or 8 C water and 4 cubes vegetable stock)
• 1 small onion (chopped)
• pepper to taste
• 1/2 t garlic powder
• 1 carton lemon or plain yogurt

Simmer while doing other things for about 30 minutes to an hour