Sour Cream Rhubarb Crostada
Cornmeal Pastry (OR use purchased refrigerated pastry if you wish)
Cornmeal Pastry
  1. In a small bowl, combine sour cream & ice water; set aside. In a large bowl, whisk together flour, cornmeal, sugar & salt. Using your fingertips, cut in the butter until mixture resembles BOTH coarse crumbs & small peas. Sprinkle the cold sour cream mixture over dough, 1 Tbsp at a time, tossing with a fork to evenly distribute it. After you have added all the liquid mixture, dough should be moist enough to stick together when pressed. Do NOT over work pastry. Press dough into a disk shape; wrap in plastic wrap & refrigerate until ready to use.
Spiced-Oat Topping
  1. In a bowl, combine all topping ingredients with fingertips until crumbly; set aside.
  1. Preheat oven to 375 F. In a bowl, Mix 1 cup sugar, 3 Tbsp flour, 1 tsp cardamom & orange zest. Stir in slightly beaten eggs & sour cream, add rhubarb; toss gently.
  2. Remove pastry from fridge. Preheat oven to 375 F. On a large sheet of parchment paper, roll out pastry into a 12-inch circle. Place pastry in a 9-inch pie pan, leaving parchment paper underneath it. Pour filling into crostada; gently fold the 1/2-inch of pastry remaining above pie pan rim over edge of crostada. Sprinkle spiced-oat topping over filling. Brush pastry edge with egg wash.
  3. Bake 50-60 minutes until edge is puffed, filling is slightly jiggly & topping is golden. Cover loosely with foil if topping begins to brown too much. Cool at least 3 hours before serving. Slice & serve with a dollop of whipped cream or a scoop of ice cream.