Prebake pie crust at 375 deg F, leave the oven on. (25mins + 5mins)
Saute the white parts of 2 medium leeks washed thoroughly and cut into 1/2 inch dice (about 2 cups), in 2 Tbs. butter, about 5-7 minutes.

Whisk together all ingredients except cheese and leeks.
Put leeks in bottom of pie crust crumble in goat cheese.
Pour the custard mixture into the pie shell (1/2 inch below rim). Bake until light golden brown and a knife inserted about 1 inch from the edge comes out clean and the center feels set but soft like gelatin 32-35 minutes. Serve warm or at room temperature.