Combine potatoes and water in a large saucepan. Bring to a boil over high heat for 20 min. or until tender. Mash coarsely. Add onions and other vegetables and seasonings. Cover and simmer until vegetables are tender, about 20 min. Add milk to chowder and simmer until slightly thickened, stirring constantly. Add cheese spread. Remove saucepan from heat and stir until cheese has completely dissolved. Garnish with fresh herbs if you wish. Serve hot. Serves 6.