1/4 C. butter, divided
4 C. chopped onion
2 tsp. brown sugar
1 T. white balsamic vinegar (optional)
2 1/2 lb. cubed peeled baking potato
1/2 C. whole milk
1/4 C. Dijon mustard
1 T. fresh lemon juice
2 T. prepared horseradish
1 T. light mayonnaise
1/2 tsp. salt

Melt 1 T. butter in a medium nonstick skillet over medium-high heat. Add onion and sugar; sauté 10 minutes or until caramelized. Remove from heat; stir in vinegar, if desired. Place potato in a saucepan, and cover with water. Bring to a boil. Reduce heat; simmer 15 minutes or until tender. Drain and return potato to pan. Add 3 T. butter and milk; mash to desired consistency. Cook 2 minutes or until thoroughly heated, stirring constantly. Combine Dijon mustard and remaining ingredients in a small bowl, stirring with a whisk until blended. Add Dijon mustard mixture and caramelized onion mixture to potato mixture, stirring to combine.

Yield: 10 servings
Serving size: 3/4 C.

Calories: 186
Fat: 6.3g
Fiber: 2.9g