Veggie Puree Soup

Ingredients

• 2 medium potatoes (peeled)
• 2 Roma tomatoes
• 2 medium carrots (peeled)
• 2 celery stalks
• 2 medium zucchinis
• 1/2 of a large onion
• 8 oz spinach (or about 3 1/2 handfuls)
• 1 cup white beans (cooked)
• 1 cup lentils (cooked)
• 4-5 pieces of bread
• 1 tbsp butter
• grated Parmesan (for topping)
• salt and pepper