Heat oven to 375°F. Combine all topping ingredients in small bowl; mix with fork until mixture resembles coarse crumbs. Set aside.
Combine 3/4 cup butter and cream cheese in medium bowl; beat at medium speed until well mixed. Add flour; continue beating until dough forms. Divide dough into 36 pieces; place 1 piece into each ungreased mini muffin pan cup. Press dough onto bottom and up sides of cups.
Combine all filling ingredients in large bowl; beat with wire whisk until smooth. Pour about 1 tablespoon filling into each unbaked tart shell; sprinkle each with about 1 teaspoon topping.
Bake for 25 to 28 minutes or until golden brown and set. Cool 5 minutes in pans; run small sharp knife around inside edge of cups to loosen tarts. Remove to wire cooling rack.
Serve at room temperature with dollop of whipped cream, if desired. Store refrigerated.
*Substitute 1/2 teaspoon ground cinnamon, 1/4 teaspoon ground ginger, 1/4 teaspoon ground nutmeg and 1/8 teaspoon ground cloves.
