Preparation Heat 1 tablespoon oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then add half of squash and sauté, stirring occasionally, until browned, about 5 minutes. Transfer browned squash to a bowl, then heat remaining tablespoon oil and sauté remaining squash in same manner. Return squash in bowl to skillet. Add garlic and sauté, stirring occasionally, 1 minute. Add water, salt, and pepper and simmer briskly, covered, until squash is tender and most of liquid is evaporated, 6 to 7 minutes. Stir in basil.
Preparation Heat 1 tablespoon oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then add half of squash and sauté, stirring occasionally, until browned, about 5 minutes. Transfer browned squash to a bowl, then heat remaining tablespoon oil and sauté remaining squash in same manner. Return squash in bowl to skillet. Add garlic and sauté, stirring occasionally, 1 minute. Add water, salt, and pepper and simmer briskly, covered, until squash is tender and most of liquid is evaporated, 6 to 7 minutes. Stir in basil.