Place strawberries on parchment paper-lined rimmed baking sheet; drizzle with 1/3 cup (75 mL) of the maple syrup. Bake in 425 F (220 C) oven for 15 minutes until juices are bubbling. Scrape into medium bowl; refrigerate 1 hour or until completely cooled.
Meanwhile, line bottom of 9-inch (23 cm) springform pan with parchment paper. In medium bowl, combine coconut and butter; press firmly into bottom of prepared pan. Bake in 350 F (180 C) oven until golden, about 13 minutes. Cool completely.
In a large chilled bowl, using electric mixer, whip cream until fluffy. Add icing sugar and vanilla; beat until stiff peaks form.
Using the same beaters and in another large bowl, beat cream cheese, lemon rind and juice and remaining maple syrup, until smooth. Beat in 1-1/2 cups (375 mL) of the cooled strawberries until combined. Stir in walnuts. Stir in whipped cream until combined. Spread over cooled crust. Spoon remaining strawberries over top.
Cover and freeze 6 hours or until firm. Slice into wedges and serve. Or, freeze up to 1 week; before serving, place in refrigerator to soften, about 5 hours.