Place the apples in large microwave-safe bowl. Add water to bowl. Cover with a microwave-safe lid (or lay a paper towel over the top), and microwave on high for 10 minutes. Stir the apples. Continue to microwave, uncovered, until apples are very tender, about 5 minutes longer.
Using a large fork, coarsely mash the apples. Mix in the sugar. The applesauce should be eaten within a few days.
Notes
This recipe can be prepared 2 days ahead. Just cover tightly and refrigerate.