Caramelized Onions and Blue Cheese Tart
 
Prep time
Cook time
Total time
 
Author:
Serves: About 40 squares
Ingredients
  • CRUST
  • 2 cups all purpose flour
  • 2 tsp baking powder
  • ¾ tsp salt
  • ¾ cup milk (preferably whole milk)
  • ¼ cup olive oil
  • 2 tbsp (1/4 stick) unsalted butter, melted
  • TOPPING
  • 2 tbsp (1/4 stick) unsalted butter
  • 2 tbsp olive oil
  • 3 large onions, halved, thinly sliced (about ⅛ thick)
  • 1 tbsp finely chopped fresh rosemary
  • 1 tsp sugar
  • ½ tsp salt
  • 1½ cups crumbled blue cheese
Instructions
  1. TO MAKE THE CRUST
  2. Preheat your oven to 425⁰F
  3. In a medium bowl, mix together the flour, baking powder and salt
  4. In a bowl or in a measuring cup, combine milk, olive oil and butter and whisk to blend.
  5. Make a well in your dry ingredients then slowly pour your milk mixture into it and stir until combined and smooth. Your crust is almost done!
  6. Put your dough on a lightly floured counter and roll it into a 10x13-inch rectangle. Transfer dough to a baking sheet. It might shrink a little when you move it, no sweat; just reform it with your hands.
  7. Pierce it all over with a fork. Leave it aside while you’re making the onions.
  8. TO MAKE THE TOPPINGS
  9. Take a large skillet and melt butter and oil over high heat, once the butter starts bubbling, add your onions.
  10. Cook the onions until soft and lightly golden, about 10 minutes. Stir often.
  11. Then add the rosemary, sugar and salt and reduce your heat to medium.
  12. Let them cook for another 20 minutes or so, until very soft and deep dark drown. This step is crucial; you need to be patient, this is where the onions get all their sweetness and flavors. Once you think they are done, add a splash of white wine or water to deglaze the pan, stirring well so the onions absorb all that flavorful liquid. Season with some pepper and let them cool a bit.
  13. Spread your lovely onion mixture all over your dough and then sprinkle your crumbled cheese.
  14. Bake for about 20 minutes or until your crust is golden and the cheese is bubbling. Your kitchen will smell amazing at that point!
  15. Once cooled, cut into squares.
Recipe by Valerie's Keepers at https://www.valerieskeepers.com/blue-cheese-and-caramelized-onion-squares/