Preheat oven to 350°F. Spray a 9" tart pan (with removable bottom) with non-stick cooking spray.
Make the crust according to package directions and press the mixture firmly into bottom and up the sides of pan. Bake for 8 minutes; crust will be pale.
In a medium bowl, combine the full pouch of lemon fi lling, whipping cream, eggs and macadamia nuts and mix until well incorporated.
Pour filling over hot crust. Sprinkle the raspberries on top of the tart or place them in the shape of a heart in the middle, pressing into the filling mixture. Reserve some berries for garnish. Bake 30 to 35 minutes or until center does not jiggle when shaken and top begins to brown slightly.
Remove the tart from the oven and cool completely before removing it from the pan. Cut and serve this easy, romantic dessert on Valentine's Day.