Creamy Mustard & Pine Nut Toast with Sautéed Mushrooms and Leeks

1. Make the Mustard—Pine Nut Spread

Start by toasting the pine nuts in a small skillet over medium heat. Stir them frequently until they turn a lovely golden color, which should take about 3 minutes. Transfer the toasted pine nuts to a mortar and pestle and pound them into a coarse paste. In a bowl, mix the pine nut paste with the olive oil, whole-grain mustard, agave nectar, a pinch of fine sea salt, and a few turns of freshly ground white pepper. This spread will serve as the creamy base for your toast, marrying the nutty richness of pine nuts with the tangy sharpness of mustard.

2. Prepare the Mushrooms

Clean and chop the wild mushrooms to your desired size. Heat a tablespoon of olive oil in a cast-iron skillet over medium-high heat. Add the mushrooms and a pinch of kosher salt, then sauté for 7 to 10 minutes until they are tender and slightly caramelized. Remove the mushrooms from the skillet and transfer them to a bowl.

3. Cook the Leeks and Thyme

In the same skillet, heat the remaining tablespoon of olive oil over medium heat. Add the finely chopped leek and cook for about 5 minutes until it becomes soft and translucent. Stir in the minced thyme and a pinch of salt, continuing to cook for another 2 to 3 minutes until the thyme releases its aromatic oils. Transfer the leek mixture to a small bowl.

4. Broil the Bread

Position your oven rack about 6 inches from the broiler and preheat. Place the thick slices of sourdough bread on a baking sheet and broil until the tops are golden brown. Flip the slices and broil the second side for about 30 seconds, just enough to give it a slight crisp.

5. Assemble and Serve

Brush each slice of toasted bread with a little extra-virgin olive oil. Spread a generous layer of the mustard—pine nut spread on each slice. Top with the cooked leek mixture and then the sautéed mushrooms. Garnish with the chopped fresh tarragon, a sprinkle of flaky sea salt, and a few grinds of freshly ground white pepper. Serve immediately and enjoy the rich, earthy flavors of this sophisticated toast.