Whisk together the eggs, sugar, lemon juice, cream, zest, and salt. Add the blueberries to the cooled tart shell and pour the filling over the blueberries. Bake for 20 to 25 minutes. The curd should jiggle slightly when done. Cool to room temperature, remove from the tart ring, and serve. To garnish, sliced lemon segments and mint leaves will do nicely!