Rhubarb Custard Bars- summer in a square

Thanks Meg and Marty for requesting this recipe! It's so good it's certain to become a regular summer treat around here!
And Roy...may you Rest in Peace!

Rhubarb Custard Bars

Pre-heat oven to 325 degrees
lightly oil a 9x13 pan
For crust:
in stand mixer, or by hand:
2 cups flour
1 cup rolled oats
1/2 cup cold butter cut into pieces
1/2 cup brown sugar
1 teaspoon salt

mix together until the texture of frozen peas. press firmly into pan and set aside

for filling:
6 eggs
1 3/4 cup granulated sugar
1 cup orange juice
1/4 cup flour
whisk all above ingredients together well... then stir in 3 cups of fresh rhubarb- chopped
pour over crust. bake 45 minutes to 1 hour until center is firm. Cool completely before cutting.
and when your delighting in how summery and wonderful these are, Thank Meg and Marty...
Happy Solstice Gals! I Love You!