1. Preheat oven to 400°. Steam potatoes according to package directions. Mash together sweet potatoes and next 5 ingredients. Spoon mixture into 8 (6-oz.) custard cups. Place on a baking sheet.
2. Beat egg whites at high speed with an electric mixer until foamy. Add sugar, 1 Tbsp. at a time, beating until stiff peaks form and sugar is dissolved. Spread meringue over sweet potato mixture.
3. Bake at 400° for 10 minutes or until golden brown.
Note: We tested with Ore-Ida Steam n' Mash Cut Sweet Potatoes.