Oatmeal Walnut Butterscotch Pie - Diamond Nuts

Ingredients

• Oatmeal Walnut Cookie crust:
• 4 oz unsalted butter
• 4.5 oz (1 cup) all-purpose flour
• 3 oz (1 cup) quick oats
• 2 teaspoons corn starch
• 1/4 teaspoon baking powder
• 1/2 teaspoon salt
• 1 teaspoon cinnamon
• 3.75 oz (1/2 cup) packed dark brown sugar
• 3.5 oz (1/2 cup) granulated sugar
• 1 egg, at room temperature
• 1 teaspoon teaspoon vanilla extract
• 3 oz (3/4 cup) toasted walnuts, chopped
• Candied Walnuts:
• 2.33 oz (1/3 cup) granulated sugar
• 1 tablespoon water
• 2 oz (1/2 cup) toasted walnut halves
• Butterscotch Mousse:
• 9 oz (1 1/2 cups) butterscotch chips
• 3/4 cup + 2/3 cup heavy cream, divided use
• 1/4 teaspoon salt
• 2 teaspoons unflavored powdered gelatin
• 2 tablespoons water