For an even richer flavor, toast the pecans in a dry skillet over medium heat for 5-7 minutes before chopping. Be careful not to burn them! If you don't have mini muffin tins, you can bake these as a single pie in a standard 9-inch pie plate. Increase baking time to 35-40 minutes. Store cooled tarts in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to 5 days. A splash of bourbon or dark rum adds wonderful depth of flavor to the filling. Add 1-2 tablespoons along with the vanilla extract.