In a small bowl mix yeast with 1 teaspoon of sugar and water. Stir and set aside in a warm place to let it bubble.

In a medium bowl, beat the egg with a2 Milk™. Add salt, sugar, vegetable oil and dissolved yeast and give it a mix.

Gradually start adding the flour while whisking the mixture until it becomes a dough that you knead.

Knead the dough ball until it's soft and elastic. Put the dough ball in a bowl, cover with a damp cloth and set aside to let it double in size (this will take 30 minutes - 1 hour)

Take a small bowl, and mix sugar with the ground cinnamon to make the filling.

Melt the butter, and use it to grease your baking tin. And preheat the oven to 180c.

Take the dough ball, and cut into smaller balls (you should have around 6) but this depends on the size of the buns that you want.

On a floured surface, take a small dough ball and flatten it into a flat circle using your fingers. Brush it with melted butter, and sprinkle with the prepared cinnamon sugar filling to the centre of the Plushka staying away from the edges.

Roll the circle into a cylinder, and then press the right edge with the left edge.

With a knife cut in the centre of the plushka from the non edge side towards the edges leaving the end uncut.

Then spread each cut to create a heart shaped plushka.

Transfer to the prepared baking tin, and bake for 15-20 minutes.