Nanna's Slow Cooker Vegetable Beef Soup

1 lb. boneless steak
2 cups diced tomatoes with beef broth (cover with water and season with salt and pepper)
3 cups water
2 large potatoes diced and cubed
3 onions
2 celery stalks
2 carrots sliced
3 beef bouillion cubes
1/2 tsp. basil
1/2 tsp. aregano
1/2 tsp. salt
1/4 tsp. black pepper
1 1/2 cup mixed frozen vegetables

Combine everything but the frozen vegetables. Cover and cook on high in a slow cooker for 6 hours. Add vegetables. Cook for 2 more hours.