Little Martin Onion Tart

Behold the Little Martin Inaugural Onion Tart
This is my first onion tart ever, and I baked it as a sort of ribbon cutting treat for all of us at the brewery today. Why? Because we have a new member of our team: Little Martin. Little Martin is a conveyor driven case taper. Although his given name is Little David, we rechristened him Little Martin because he'll be taking Marty's old gluing position on the bottling line, helping us become more efficient.

So, about this onion tart:
Pastry
* 1 1/2 c. flour
* 1/2 t. salt
* 1/2 c. unsalted butter
* 1/4 c. water

Filling
* 3 lbs. sweet onion, thinly sliced
* 4 T. unsalted butter

1) Make pastry
2) Melt butter and slowly cook onions over low-medium heat until soft & sweet, about 50 minutes
3) Allow onion to cool
4) Roll pastry into pan
5) Add onion to pan, bake at 375F for 50-60 minutes
6) Garnish with powdered sugar (using an awesome stencil of course)