⅓cupCitrus and Passion Fruit Curdpremade or check out recipes in post
Remove egg and butter from refrigerater - all to warm to room temperature. Combine flour and salt in a small mixing bowl. Finely chop the macadamia nuts - I like to use my mini chopper.
Place the room temp butter and sugar in the bowl of your stand mixer fitted with the paddle attachment - beat on medium speed until light and fluffy - about 2-3 minutes. Stop mixer and add in the egg yolk and vanilla - mix until well combined. Stop mixer and carefully fold in dry ingredients. Mix on low until well combined. Use a spatula to fold the chopped mac nuts into the cookie dough.
Use a large cookie scoop (1.5 Tbsp) or two spoons to make balls of dough that are about 1.5 tablespoons each. Roll each scoop into a ball and use your thumb to make an indent in each cookie - arrange dough on a parchment lined quarter sheet pan
Move the dough to the freezer to chill for 30 minutes.
Arrange frozen cookies on a half sheet pan - at least an inch apart Use your mini cookie scoop (½ Tbsp) to add a small scoop of Passion Fruit and Citrus Curd to each cookie. Bake cookies at 350° for 12-13 minutes. Remove cookies from the oven and allow to cool completely before removing from the pan. Dust with powdered sugar if desired.