1. Melt butter in a medium nonstick skillet over medium-low heat; add sugar, and cook 4 minutes or until mixture is bubbly, stirring occasionally. Stir in pecans; cook 4 minutes or until sugar melts and pecans are well coated. Quickly spread pecans in a single layer on wax paper. Cool completely. Break into small pieces.
2. Combine pecans, lettuces, and next 3 ingredients in a large bowl; toss well. Add dressing; toss well to coat. Serve immediately.