Rustic Fig, Serrano Ham & Hazelnut Tartines

INGREDIENTS

• 6 thin slices (3 ounces or 90 g) Serrano ham
• 1 teaspoon chopped fresh parsley
• 2 tablespoons hazelnuts
• 2 teaspoons balsamic vinegar
• 1 tablespoon olive oil
• 3/4 teaspoon salt
• 1 cup (40 g) watercress, tough stems removed
• 1/4 teaspoon freshly ground black pepper
• 1 stick (8 tablespoons or 110 g) cold unsalted butter, cut into 1/2-inch cubes
• 1/4 small red onion, thinly sliced
• 3 tablespoons hazelnut flour
• 1 teaspoon fresh thyme leaves
• 4 ounces (110 g) creamy goat cheese
• 2 tablespoons tapioca starch
• 2 teaspoons ground chia seeds
• 6 to 8 tablespoons ice water
• 3/4 cup (105 g) superfine brown rice flour, plus more for dusting
• 1/4 cup (35 g) millet flour
• 8 ounces (225 g) Black Mission figs, halved