Directions:

For Tarts:
Heat oven to 350 F. Use pan with removeable bottom. Grease 9x1-inch tart pan with nonstick cooking spray. Wrap outside bottom and side of pan with aluminum foil to prevent leaking.

Heat chocolate and butter in 1-quart saucepan over low heat, stirring frequently, until melted; cool slightly.

Mix sugar, flour and eggs in large bowl with spoon until well blended. Stir in chocolate mixture. Pour into pan. Bake 30-35 minutes or until edges are set. Cool completely on wire rack.

For Chocolate Glaze:
Heat chocolate and butter in small saucepan over low heat, stirring constantly, until melted. Remove from heat.

Stir in powdered sugar and 2 tbsp. boiling water until smooth. Stir in additional water, 1/2 tsp. at a time, until spreadable. Spread warm glaze over tart.

For White Drizzle:
Microwave white baking bar and oil on MEDIUM setting 20-30 seconds; stir until smooth. Drizzle over warm chocolate glaze. Let stand until glaze is set. Remove foil and side of pan before serving.