Greek Style Navy Bean Soup

Greek Style Navy Bean Soup.
Healthy and delicious.
Ingredients.
1/2 bag of navy beans.
1 medium onion.
2 medium size tomatoes.
Olive oil.
1/2 cup of fresh celery flakes or 1 celery stick.
3 to 4 medium size carrots.
1 beef bouillon (optional).
Salt, pepper.