For crust: Blend all ingredients in food processor until small clumps form. Press mixture into bottom and sides of 9 inch tart pan.
Preheat oven to 325 degrees. Stir condensed milk and next three ingredients in medium bowl to blend. Set condensed milk mixture aside.
Beat egg whites with sugar in large bowl until soft peaks form. Gently fold 1 1/2 cup condensed milk mixture into whites until combined. Fold remaining milk mixture into whites until just incorporated.
Pour mixture into crust.
Bake until filling puffs about 40 minutes.
Cool tart completely. Chill until cold. Garnish with whipped cream and lime slices.