Plum Tart with Goat Cheese and Walnut-Thyme Streusel Recipe

Ingredients

• 1 cup all purpose flour
• 1/2 cup powdered sugar
• 1/2 cup walnuts (about 2 ounces)
• 1/4 teaspoon coarse kosher salt
• 7 tablespoons chilled unsalted butter, cut into 1/2-inch cubes
• 1 egg yolk
• 2/3 cup walnuts (about 3 ounces)
• 1/3 cup (packed) golden brown sugar
• 1/3 cup sugar
• 1/2 teaspoon coarse kosher salt
• 1/4 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg
• 1/4 teaspoon ground cardamom
• 1 teaspoon fresh thyme leaves
• 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch cubes
• 8 ounces soft fresh goat cheese
• 8 ounces (1 cup) whole-milk ricotta cheese
• 3 tablespoons honey
• 3 tablespoons extra-virgin olive oil
• 1 tablespoon sugar
• 1/8 teaspoon coarse kosher salt
• Pinch of freshly ground black pepper
• 4 large plums (about 1 pound), halved, pitted, cut into 1/4-inch-thick wedges
• Fleur de sel*