Apple and Pear Crisp

INGREDIENTS

• 1 teaspoon grated orange zest
• 1 1/2 cups all-purpose flour
• 2 pounds ripe Bosc pears (4 pears)
• 1/4 cup all-purpose flour
• 1/2 teaspoon kosher salt
• 2 pounds firm Macoun apples (6 apples)
• 3/4 cup granulated sugar
• 3/4 cup light brown sugar, lightly packed
• 2 tablespoons freshly squeezed orange juice
• 1 cup old-fashioned oatmeal
• 1/2 pound (2 sticks) cold unsalted butter, diced
• 1 teaspoon grated lemon zest
• 1 teaspoon ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/2 cup granulated sugar
• 2 tablespoons freshly squeezed lemon juice