Brown your butter in a saucepan – melt over medium high heat and swirl the saucepan. Foaming will subside. Cook while scraping bottom of saucepan until your butter is a golden brown and has a great nutty smell. This will take less than 5 minutes – keep watching, as it burns easily! Remove from heat and add water – this will bubble vigorously but then calm down.
Add browned butter to flour mixture and stir well. Let sit until cooled down, about 10 minutes.
Using your fingers, press dough on bottom and sides of a tart pan. Original recipe calls for 9 inch round, but I used my long and skinny tart pan with no problems. Bake on a rimmed cookie sheet until lightly browned for 25 minutes or so. Let crust cool completely.
Over a double boiler, carefully melt white chocolate, cream, lemon juice, zest, and salt.
Whisk in a small amount of marscapone and stir. Add the rest and stir until nice and smooth.
Pour filling into tart pan and smooth into a nice layer.
Add whatever cut fruit you have to filling, setting gently on top.
Gently warm up the preserves with 1 tsp of lemon juice until runny, either on stove or microwave. Strain the preserves to get a very thin, liquid mixture.
Carefully dab the preserve mixture over the fruit only.
Refrigerate at least 30 minutes and enjoy!
Recipe adapted from Cooks Illustrated fresh fruit tart recipe from the July/August 2017 issue.