HEAT oven to 350ºF. Combine 3 cups granola and butter in large bowl; mix well. Firmly press mixture onto bottom of 11 x 7-inch pan. Bake 10 minutes; cool.
COMBINE sweetened condensed milk and yogurt in medium bowl; mix until smooth. Add fruit, mix well.
STIR in lemon juice. Pour mixture over prepared crust. Sprinkle with remaining 1 1/4 cups granola. Cover; freeze overnight or until firm.