Mushroom Soup with Onion

Ingredients

• 2 cups fresh mushrooms
• 3 tbsp butter
• 2 medium onions (chopped)
• 2 tbsp all-purpose flour
• 5 cups chicken or vegetable stock
• 1/2 tsp salt ((optional))
• dash black pepper
• 1/3 cup long-grain rice
• 1 bay leaf
• 2 tbsp fresh parsley (chopped)