Mix pudding to package directions and let stand 5 minutes. Grind gingersnaps in food processor into crumbs. Remove bowl from processor and take out blade. Add butter to the food processor and stir to moisten the crumbs. Pour crumbs into 4 small glass bowls and press the crumbs up the sides of the bowls, lining each dish with a ginger snap "crust". Add a few slices of strawberries to each bowl. Fill each dish with lemon pudding and top with a few more sliced berries and chopped crystallized ginger. Add a whip cream rosette to each dessert and garnish with lemon zest.