Orange Date Filling: In a small saucepan, combine dates, orange rind and juice and bring to a simmer over medium heat. Cover and reduce heat to low. Cook, stirring once for about 8 minutes or until juice is absorbed and dates are very soft. Remove from heat and stir to break up dates. Stir in hazelnuts and vanilla; set aside to cool.
In a bowl, whisk together flour, oats, baking soda, cinnamon, nutmeg and cloves; set aside.
In a large bowl, using an electric hand mixer, beat together butter, granulated and brown sugars until fluffy. Beat in egg and vanilla. Using a wooden spoon stir in flour mixture then, using hands, bring dough together into a soft mixture.
Using 1 level tbsp (15 mL) of the dough flatten into a circle. Place 1 tsp (5 mL) of the Orange Date Filling into the centre and top with another tbsp (15 mL) of dough flattened into a circle and pinch edges to seal. Place on parchment paper lined baking sheet and repeat with remaining dough and filling. Bake in preheated 350 F (180 C) oven for about 12 minutes, or until lightly golden around edges. Let cool slightly before serving.