Ten minutes before the crust has finished baking, start making the filling.
Set a large fine mesh sieve over a large non-metal bowl. Set aside.
In a medium saucepan, whisk to combine the sugar, flour and salt. Whisk in the eggs and yolks til completely combined then whisk in the lemon zest and lemon juice.
Place over medium low heat and whisk constantly until curd thickens, about 6-8 minutes and reaches 160 F.
Remove from heat and whisk in the olive oil til combined. Strain curd through the large fine mesh sieve set over the large non-metal bowl.
Immediately pour curd into the warm tart shell. (You will have a little extra filling if you're using a 14 inch rectangular tart pan. Just discard extra filling. Do not overfill tart pan).
Bake at 350 for 7-11 minutes until curd is just set and barely jiggles when you shake gently. Remove from oven and set pan on a wire rack to cool for 2 hours at room temperature.
When ready to serve, remove outer ring of the pan. Use a metal spatula or cake spatula to slide underneath the tart shell to gently remove it from the bottom of the tart pan.
Slice the tart with a long sharp knife and enjoy!