Peach Crisp - Once Upon a Chef

Ingredients

• 3 pounds peaches, peeled, pitted and cut into ¼-inch slices
• 2 tablespoons lemon juice, from 1 lemon
• ⅔ cup granulated sugar
• 2 tablespoons cornstarch
• ½ teaspoon vanilla extract
• ⅛ teaspoon salt
• ¾ cup packed dark brown sugar
• ¾ cup all-purpose flour
• ½ cup old-fashioned rolled oats
• ⅔ cup pecans, chopped
• 1 teaspoon ground cinnamon
• ¼ teaspoon nutmeg
• ¼ teaspoon salt
• 1 stick (½ cup) unsalted butter, softened
• Vanilla ice cream or sweetened whipped cream