Irish Apple Crisp

Bahan-bahan (6 porsi)

• 2 pounds Rome, Beauty or Winesap apples, (peeled, cored and sliced thinly)
• 2 tablespoons freshly squeezed lemon juice
• ¾ cup packed light brown sugar, (divided)
• 2 tablespoons Irish whiskey
• 1 teaspoon ground cinnamon
• ¼ teaspoon cardamom
• 1 pinch salt
• 1 cup all purpose flour
• ¼ cup Irish oatmeal
• 6 tablespoons cold unsalted butter, (cut into pieces)
• ⅓ cup chopped walnut pieces, (toasted)
• freshly whipped cream and caramel sauce for serving ((optional))