Spread cooked leeks evenly onto crust leaving a 1-1/2" border. This would make the leeks into an 8" circle. Yeah math!
Crumble the goat cheese over the leeks followed by the tomatoes.
Fold/crimp the edges of the crust up and slightly over the filling.
Brush edges of crust with egg wash.
Bake on upper middle rack at 450°F for 25-30 minutes.
Allow to cool for at least 5 minutes before slicing. Top with ripped basil leaves or chiffonade while cooling.
Cut into slices to serve. Leftovers may be refrigerated and reheated. I used my air fryer/toast settings.