Veggie Soup

1. Chop the potatoes, onion, celery stalks, and carrots into small pieces.
2. In a large pot, melt the butter over medium heat.
3. Add the chopped vegetables to the pot and sauté for about 5 minutes until slightly softened.
4. Pour in enough water to cover the vegetables, then add the bouillon cubes and diced tomatoes.
5. Bring the soup to a boil, then reduce the heat and let it simmer for about 30-40 minutes until the vegetables are tender.
6. *Optional* Toast the bread slices until golden brown and crispy.
7. Serve the veggie soup hot, garnished with grated Parmesan and accompanied by toasted bread slices.