Step 1

Position a rack in the center of the oven, preheat to 325ºF (165ºC/Gas Mark 3). Grease and flour a 9 by 5 by 3-inch loaf pan.

Step 2

To make the cake: Grind the pistachios in a food processor just until they resemble flour. Be careful to not grind them into pistachio butter, though that would be delicious. Add the flour, baking powder, and salt to the bowl of the food processor. Pulse until combined.

Step 3

In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with an electric mixer, beat the butter on medium high speed until smooth, then, with the mixer still running, slowly stream in the sugar. Cream the butter and sugar together until very light and fluffy, about 5 minutes. Add the eggs one at a time, beating for 30 seconds after each addition. Occasionally stop the mixer and scrape down the sides of the bowl to ensure even mixing. Add the vanilla and almond extracts.

Step 4

With the mixer on low speed, alternate adding the flour mixture and the milk to the batter in three additions, mixing until just combined. Finish mixing the batter by hand with a rubber spatula. Make sure to scrape the bottom and sides of the bowl to ensure even mixing.

Step 5

Pour the batter into the prepared pan, smooth the top, and bake until the cake is golden brown and a toothpick inserted into the center comes out clean, 45 to 55 minutes. Cool for 15 minutes in the pan, then remove the cake to a rack to cool completely.

Step 6

To make the strawberries: Combine the sugar, lavender, and vanilla seeds in a mortar and grind with a pestle until the lavender is broken up into fine bits and the sugar is fragrant. Alternately, this can be done in a food processor. Hull and slice the strawberries in half if they are small, in quarters if they are larger; combine the sliced strawberries and sugar in a bowl and stir gently. Let the berries macerate for at least 15 minutes at room temperature before serving.

Step 7

To serve: Slice the cooled cake into thick pieces and top each slice with a generous spoonful of berries and their juices. Top with whipped cream. Extra cake keeps in an airtight container at room temperature for three days.