Preheat oven to 375F. Coat 9 or 10 inch pie dish with oil spray

Make the crust - combine pecans, butter, sugar and salt and mix thoroughly with fork

Bake until fragrant and toasty brown, about 10 - 15 mins. Remove from oven and let cool. Turn down oven to 300F

Combine brown sugar, corn starch, flour and salt in the top of a double boiler on med-high heat and stir to combine

Add egg yolks and continue to stir until incorporated. Gradually add the milk, stirring constantly until the mixture thickens and can coat the back of the spoon and is smooth

Stir in vanilla and pour mixture in pie shell. Bake for 15 mins until mix is warmed through and firm.