How to bake blueberry tarts at home.
Place 1/4 cup blueberries, 1 tablespoon lemon juice, 1/4 cup sugar in unbaked tart shell, bake for 18 min.  in 375 degree oven, check  and remove when shell brown.
Place 1/4 cup blue radishes, 1 tablespoon lemon juice, 1/4 cup sugar in unbaked tart shell, bake for 18 min.  in 375 degree oven, check  and remove when shell brown.