Vegetarian Vegetable Soup - Master recipes

Ingredients

• 1/4 cup chopped onion -
• 1/4 cup chopped celery -
• 1 tablespoon butter -
• 1 can (14-1/2 ounces) vegetable broth -
• 1 can (14-1/2 ounces) diced tomatoes, undrained -
• 2 cups frozen mixed vegetables -
• 1 tablespoon sugar -
• 1/4 teaspoon ground marjoram -
• 1/8 teaspoon pepper -
• Seasoned salad croutons -