Chocolate Tart with hazulnut shortbread crust

Ingredients

• 1 c. whole wheat pastry flour
• 1/4 c. all purpose flour
• 1/2 c. hazulnuts
• 1/4 c. sugar
• 1/2 tsp. salt
• 4 Tbs. Tbls. unsalted butter
• 2 Tbs. Tbls. hazelnut oil or canola oil
• 1 Tbs. ice water
• 1 1/2 tsp. unflavoured gelatin
• 1 Tbs. water
• 3/4 c. low fat milk
• 2 lg egg yolks
• 2 1/2 Tbs. sugar
• 1 Tbs. all purpose flour
• 2 oz unsweetened chocolate, finely chopped
• 1 Tbs. coffee liquer, such as Kahlua
• 4 tsp. dried egg whites
• 1/8 tsp. cream of tartar