Preheat the oven to 350 F (175 C). Grease a 9-inch springform pan and line the bottom with parchment.

In a medium bowl, toss the blueberries with the lemon juice and 1 tablespoon of the sugar. In a separate bowl, sift the flour, baking powder, 1/2 teaspoon of the nutmeg and the salt.

Using an electric mixer, cream the butter and 1/4 cup (187g) of the sugar on medium-high speed until light and fluffy, about 3 minutes.

Add the eggs, 1 at a time, beating well after each addition. Scrape down the sides of the bowl. With the mixer on low, beat in the sifted ingredients. Do not overbeat. Scrape into the prepared pan and smooth the top.

Scatter the berries and any juices over the batter. Stir the remaining 1 & 1/2 tablespoons of sugar and the remaining 1/4 teaspoon of the nutmeg together and sprinkle the mixture over the berries. Bake in the center of the oven for 50-60 minutes or until a skewer comes out clean and the cake just begins to pull away from the sides.

Cool in the pan for 30 minutes.

Remove the cake from the springform pan and let it finish cooling completely. Slide a wide, thin spatula under the cake to transfer it to a large plate. Wrap tightly with plastic and let it mellow at room temperature for several hours or overnight before eating.