Preheat the oven to 350F°
Slice the peaches into ¼ inches and arrange them neatly in the prepared tart shell.
In the oven and bake for 25 minutes.
Puree or blend the apricot jam until very smooth.
Add all the remaining ingredients and whisk to combine thoroughly.
After 25 minutes of baking, Brush the apricot mixture on top of the peaches.
Continue baking for another 35 minutes or more, until the tart shell is nicely brown and the filling is bubbling.
Let it cool completely before serving to help set the juices.