Add onions and cook until tender
Add Potatoes, celery, carrots, garlic and italian seasonin and cook for 4-5 mins
Stir in cornstarch. Add Milk, cook and stir until mixture comes to boil and thickens
Add tomatoes, broth and paste. Return to boil then reduce to simmer for 20 mins or until vegetables are cooked.
Season to taste with salt and pepper and serve