2 teaspoons finely chopped shallot

1-inch piece of fresh ginger root, peeled and grated

1 small garlic clove, peeled and finely chopped

1 1/2 tablespoons rice vinegar

1 tablespoon tomato ketchup

1 tablespoon water

1/2 cup minus 1 tablespoon vegetable oil

3 tablespoons light soy sauce