Combine raspberries, sugar, liqueur and orange juice concentrate in a bowl and combine with rubber spatula. Transfer to medium saucepan.
Place saucepan on the side burner of a propane grill, heat mixture on medium heat. Let simmer for 5 to 7 minutes to make compote.
Combine the orange extract and whipped topping and set aside.
On a serving platter, place 1 shortbread cookie face up, top with a spoonful of raspberry compote, a dollop of whipped topping, and place a second cookie (or other half of shortbread biscuit) on top. Garnish with a dollop of whipped topping, several raspberries and orange zest.