sour cherry pie with almond crumble

INGREDIENTS

• 1/2 recipe
• 2/3 cup whole oats, ground to a flour in a food processor (yielding 1/2 cup oat flour)
• 1/2 cup all-purpose flour
• 1/2 cup sugar
• 1/4 teaspoon ground cinnamon
• 1/2 teaspoon kosher salt (you might want to first
• )
• 3/4 cup unsalted whole almonds, coarsely ground in a food processor or chopped medium fine by hand
• 6 tablespoons unsalted butter, melted and cooled
• 3/4 cup sugar
• 3 tablespoons cornstarch
• 1/4 teaspoon kosher salt
• 2 1/4 pounds fresh sour cherries, pitted, or 2 pounds frozen sour cherries, partially thawed