Hamburger Soup

Ingredients

• 1 medium yellow onion
• 14 oz diced tomatoes
• 1 lb ground beef
• 1 pinch dried oregano
• 4 cups beef broth
• 1 pinch black pepper
• 3 medium carrots
• 1 tsp salt
• 1 cup green beans
• 2 medium potatoes
• 1/2 cup celery