Red Currant Bakery

Tart Shell
0 Preheat the oven to 350º F and place a rack in the center of the oven.Add the sugar, vanilla, and salt into the bowl with the butter and stir to combine.
2 Cut the butter into 1" cubes and add to a heat and medium microwave safe mixing bowl. Heat briefly in 15 second intervals until the butter has just started to melt but isn't fully melted.
3 Pour in the all purpose flour and use a fork to cut the butter into the flour. Mix until just combined. If the mixture is too warm and squishy, simply put it in the fridge for a few minutes to allow the butter to firm up.
4 Pour the crust into the tart pan. Press the crust into the sides of the pan and across the bottom with your fingers. Use your thumb or your pointer finger to really press it into the bottom corner so that you don't get a super thick pastry corner.
5 Place the tart in the freezer to chill for 15 minutes.
6 Once chilled, bake the tart in the preheated oven for 15 minutes. Once partially baked remove the tart from the oven and place it on a wire rack to cool.
7 Leave the oven on.
Hazelnut Frangipane Filling
9 Add the butter into a medium pot or pan and place over medium low heat. First the butter will melt, then it will start to bubble and pop, finally it will go silent and that's when you need to watch it like a hawk. Stir and wait until you see little brown bits.
10 Immediately remove it from the heat and pour it into a heat safe bowl. Set aside to cool until it is no longer melted but more of a spreadable consistency. To speed it up, place the bowl in an ice bath and stir regularly.
11 Once cooled, pour in the sugar, almond and vanilla extract, and salt. Whisk to combine.
12 Crack in one egg and whisk to combine. Add in the second egg and whisk again.
13 Finally pour in the hazelnut (or almond) flour and whisk again.Set the filling aside while prepping the plums.
Assemble & Bake
15 Rinse, pit, and cut the plums into quarters. If the plums are bigger cut them into 1/4" slices. 
16 Pour the filling into the cooled tart.
17 Arrange the plums on the filling, starting in the center and fanning out. If using larger standard plums, lay the slices on their sides as they will collapse while baking.
18 Bake for 25 minutes, then rotate the pan 180 degrees. Bake for another 15-20 minutes until the filling doesn't wobble and the top is golden brown.
19 Once baked, remove the pan from the oven and place on a wire rack to cool until it is room temperature.
20 To remove it from the tart pan, place the pan on top of a small bowl or jar. Wiggle the pan edge away from the crust to carefully pop it off and let it come down from the tart.
21 You may need to loosen the pan edge from the bottom with a dinner knife if there was any butter that leaked and hardened. Do this by running the knife in between the bottom of the pan and the edge piece (this is underneath the tart).
22 Once the base is removed, slice the tart as desired and serve. Store leftovers in the fridge but if freshly baked, leave the tart out at room temperature until ready to serve it.
23 Dust the top with powdered sugar just before serving.