Wild Herb Tart

Wild herb tart is what a French countryside cook makes with whatever’s coming up green in the garden. Spinach, leek, green onion, and a generous handful of fresh parsley all go in raw, shredded thin, and bound in a custard of eggs, milk, and cream.

Adding the greens uncooked is the key decision. It means they release their moisture into the custard as it bakes, keeping the tart tender and loaded with bright, grassy flavor. Pre-cooked greens lose their perfume and bleed color into the filling, giving you a grayish finished tart nobody wants.

Shredding the greens fine is what makes that possible. Big torn leaves stay watery and make the custard weep. Thin ribbons distribute evenly and set clean in the slice.

A blind-baked or par-baked pie shell is essential. The custard is wet, the greens are wetter, and a raw crust won’t stand up to that much liquid.

Bake in a moderate oven until the custard is set with just a slight jiggle in the very center. Let it rest 10 minutes before slicing. The pieces hold clean and the flavors settle.

Chef Tips

• Wash the leeks carefully and slice thin. Grit hides in leek layers and ruins a tart in one bite.
• Add a pinch of fresh grated nutmeg to the custard. It’s the classic French move and turns the greens from grassy to elegant.
• Grate in 2 to 3 ounces of a sharp cheese (Gruyere or aged cheddar work best) when stirring in the filling. The recipe says “cheese” but doesn’t specify, so go bold.
• Serve at room temperature. The flavors show up better than they do straight from the oven.

Variations

• Add a handful of chopped sorrel or wild arugula for tangy bite and a truly “wild herb” character.
• Stir in a cup of sauteed mushrooms for extra savory depth.
• Top with crumbled goat cheese or feta in the last 10 minutes of baking for tangy pops.