One of the beautiful things about the summer is the variety of colours and flavours of the fruit. Summer season is full of delicious and colourful berries, and it is a perfect time to make all the baking additives, such as filling and fruit reductions. This yummy and pretty Blueberry Filling is one of the endless possibilities.
Massage the lemon zest with granulated sugar before adding it to the recipe. The friction between the sugar granules and lemon zest helps release the citrus oil and fragrance from the spice.
½ cup Sugar, 2 tablespoon Lemon zest
Whisk the eggs, yolk, and sugar zest well and pour them into a non-metal saucepan. Metal pans cause the Blueberry Filling to have a metallic undertaste. Place the pan on medium heat, keep whisking until the mixture is thick and lighter in colour.
2 Eggs, 1 Yolk
Add the blueberries, and I recommend using frozen ones to get a more vibrant colour. Continue whisking the mixture and try breaking all the berries.
2 cups Blueberries
Whisk the lemon juice and cornstarch in a small bowl, add to the blueberries and mix until the mixture is thick and has a jam consistency, about 10-15 minutes.
3 tablespoon Lemon juice, 1 teaspoon Corn starch
Remove from the heat and pour it into a bowl through a fine strainer to remove the blueberry skin and lemon pulps.
Add the butter and vanilla extract, and whisk until the butter melts completely.
1 tablespoon Vanilla extract, ¼ cup Butter
Cover its top with cling wrap or wax paper to prevent skin from forming on top of it. Let the filling cool down fully, pour it into a jar and store it in the fridge for up to two weeks.