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breakfast-brunch-dessert:

Triple Berry Pie Bars
Crust and Topping: 

• 2 cups all-purpose flour 
• 1 cup quick oats 
• 1 1/2 cups sugar 
• 1/4 tsp salt 
• 1 1/2 cups (3 sticks) unsalted butter, chilled

Fruit Filling:

• 4 large eggs 
• 2 cups sugar 
• 1 cup sour cream 
• 3/4 cup flour 
• pinch salt 
• zest of 1/2 lemon 
• 1 tsp. vanilla extract 
• 2 (16-oz) packages frozen mixed berries (strawberries, blackberries, and blueberries)

Directions

1. To make the crust and topping, preheat the oven to 350 degrees. Grease a 9x13 baking pan.  
2. Put oats into the food processor and pulse until a coarse “flour” forms. Add the regular flour, sugar, and salt to the food processor. Pulse a few times to mix. Cut the butter into 1/2-inch cubes, and add to the flour mixture. Process until the butter is evenly distributed but the mixture is still crumbly, 30-60 seconds.  
3. Reserve 1 1/2 cups of the mixture to use as the topping. Press the remaining mixture into the bottom of the pan, and bake 12-15 minutes. Cool for at least 10 minutes.  
4. To make the filling, whisk the eggs in a large bowl, then add the sugar, sour cream, flour, salt, lemon zest, and vanilla extract. Gently fold in the berries and spoon the mixture over the crust. Sprinkle the remaining flour mixture evenly over the filling, and bake 45 to 55 minutes.  
5. Cool at least 1 hour before cutting into bars. Serve bars warmed, chilled, or at room temperature!