Blueberry Sauce:
1/3 cup (65 grams) granulated white sugar
1 1/2 teaspoons (5 grams) cornstarch
1/8 teaspoon salt
1/3 cup (80 grams) water
1 pint (2 cups) (315 grams) fresh blueberries (can also use frozen blueberries)
1/2 teaspoon (1 gram) freshly grated lemon zest (outer yellow skin)
1/2 tablespoon (8 grams) freshly squeezed lemon juice, or to taste
2 tablespoons (30 grams) lemon liqueur (optional)
12 thin slices of cake (you can use a white or yellow butter cake, pound cake, sponge cake or even ladyfingers)
Whipped Cream:
1 cup (240 grams) cold heavy whipping cream (contains 35-40% butterfat)
1/2 cup (115 grams) Mascarpone Cheese (can also use cream cheese)
2 tablespoons (25 grams) granulated white sugar, or to taste
1 teaspoon (4 grams) pure vanilla extract
1 cup (150 grams) fresh blueberries
Crushed Gingersnap cookies (home made or store bought)