Crockpot Beef and Tomato Vegetable Soup

1 cup onions, diced

4 large carrots, peeled, halved and sliced into 1 inch pieces

3 large red potatoes, peeled and cut into bite sized pieces

1- 8 ounce container white mushrooms, sliced

1- 14.5 ounce can diced tomatoes

1 cup fresh tomatoes, diced

1 pound beef stew meat cooked

3 1/2 cups beef broth

1 tablespoon fresh parsley, minced

1 tablespoon fresh basil, minced

salt and pepper, if desired