Step 1

Process cashews, brown sugar, cardamom and salt in a food processor until finely ground. Add 3/4 cup coconut oil and zest; pulse until blended and smooth. Add the flour, pulsing until a soft dough begins to form. Transfer dough to a medium bowl.

Step 2

Place Turbinado sugar in a shallow dish. Roll dough into 1-inch balls; roll in sugar to coat. Place on wax paper-lined platter and gently press fingertip into each ball to create a depression. Cover and refrigerate cookies at least 2 hours.

Step 3

Preheat oven to 325°F. Remove cookies from refrigerator and arrange 1-inch apart on parchment-lined cookie sheet. Bake 18 to 22 minutes until golden and just set. Transfer to a rack and cool completely.

Step 4

When cookies are cool, prepare filling: Put chocolate and remaining 4 tbsp coconut oil in a small microwave-safe bowl . Microwave on medium power for 1 to 2 minutes; stir after the first minute, then stop and stir every 20 seconds until completely melted and smooth. Whisk in lime juice. Fill the depression of each cookie with chocolate mixture.  If desired, garnish with mukhwas and lime zest. Chill 5 minutes to set ganache.