It’s just like leaves drifted right down from the trees and settled onto your tart! If dead leaves tasted like crisped chard and oyster mushrooms? Ok, maybe forget about the dead leaves part. I do like how this tart mirrors the beauty of this time of year but no one really needs to think about decomposing fall foliage on their dinner plate. Instead, lets focus on the flavour.
This tart is irresistible, if I do say so, and I say that as a warning, not to brag. I tried hard to control myself, since it’s pretty luscious with leek-scented cream layered onto puff pastry. But I ate more than I intended to throughout testing the recipe. It’s supposed to be the special, meat-free offering at a Thanksgiving feast. Not something to be snacked on while I do the dishes. At a special dinner, it’s a perfect indulgence, plated nicely beside roasted root vegetables, gravy and all of the other fixings. Or sliced into small slivers, it’s the best treat you could offer up with a sip of champagne to get the evening started. And let your guests be the ones to mention that yes, it really does look like the quintessential autumn tart. Nod, smile, and then steer the conversation away from decay.
Leek Cream Sauce
1 tbs unsalted butter
1 tbs extra virgin olive oil
1 c leeks, white and light green part only, washed well and sliced crosswise
1/2 tsp kosher salt, divided
1/4 c heavy cream
Splash dry white wine
Squeeze lemon juice
2/3 c leek cream sauce
1 pkg puff pastry, thawed and kept refrigerated until ready to roll out
6-10 Swiss chard leaves only, (feel free to use Lacinato (flat) kale, or any other flat, dark green leaf)
250 g oyster mushrooms, trimmed rinsed and dried
First, make the leek cream sauce: Heat the butter and olive oil in a small pan over medium heat. Add the leeks and half the salt, stir, then lower the heat to low. Sauté until the leeks are softened, stirring occasionally and making sure the leeks don’t brown. Add the remaining salt, cream, and wine. Bring to a low simmer and cook for a few minutes to heat the sauce and allow it to reduce slightly. Remove from heat and puree until fairly smooth. Add lemon juice and taste. Season with salt and touch more lemon juice if needed. Let cool. (Can be made in advance. Bring to room temperature before using.)
Makes about 2/3 cup.
Preheat oven to 375F degrees.
Quickly roll out dough on a lightly floured surface with a lightly floured rolling pin to an 11 x 18″ rectangle. Transfer to a parchment paper-lined baking sheet of the same size. Score a 1/2-inch edge around the rim of the rectangle and dock the interior all over with a fork. Spread cooled leek cream sauce evenly over the tart up to the edges of the scored rim. Lay chard leaves on top evenly (gaps are fine) and tear oyster mushrooms over top. Season lightly with salt. Bake for about 20 minutes until the edges of the tart are golden.
Remove, transfer tart on parchment to a cutting board, slice into 6 pieces and serve as a main. Cut into bite-sized pieces to serve as an appetizer either warm or at room temperature.