Heat oven to 350°F. In medium saucepan, combine sugar and water; mix well. With pastry brush dipped in water, brush any sugar off sides of saucepan. Without stirring, cook over medium-high heat for 5 to 6 minutes or until mixture begins to turn amber in color. Gently swirl pan as mixture darkens to golden brown. (Watch carefully as mixture can burn in seconds.) Immediately remove from heat. Carefully pour and swirl caramel in bottom of ungreased 10-inch deep-dish glass pie pan.