Chicken and Pumpkin Goulash

Name: Chicken and Pumpkin Goulash
Ingredients: 2 (14.5 ounce) cans diced tomatoes; 1 tablespoon brown sugar; 2 tablespoons olive oil; 1 onion, chopped; 1 teaspoon ground ginger; 1 teaspoon ground cinnamon; 1 teaspoon ground cumin; 1 tablespoon ground coriander; 1.5 pounds skinless, boneless chicken breast halves, cut into bite size pieces; 1 (15 ounce) can garbanzo beans, drained and rinsed; 3 pounds fresh pumpkin, peeled and cut into 3/4-inch cubes; salt, or to taste; 1 teaspoon cornstarch; 0.25 cup water