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1
At least two and a half hours ahead, prepare the pizza dough. In a large mixing bowl, mix the yeast and 1/4 cup warm water and allow to sit for a few minutes until it foams up. Mix in the remaining ingredients, alternating between the flour and water. You may need a little more or less of the water or flour, depending on ambient moisture. When combined, turn the dough onto a work surface (I like to use a large silicone mat for easy clean up) and knead for several minutes until the dough is satisfyingly elastic. Transfer the dough to a lightly oiled bowl, or if using, loosely wrap the dough in the silicone mat and transfer it right back into the dough mixing bowl. Allow the dough to rise until it has doubled in bulk for a coupe of hours. You can also make this dough in the morning and let it rise in the refrigerator during the day and it will be ready at dinnertime.
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2
Prepare the kale pesto. Set a pot of salted water to boil. In a toaster oven or on the stovetop in a dry skillet, toast the walnut pieces until fragrant. Remove the kale leaves from the stems. When the water is boiling, blanch the kale leaves for one minute and then quickly transfer to a bowl of ice water to halt the cooking. In the bowl of a food processor, pulse the walnuts into a coarse chop. Squeeze the kale dry and add to the food processor. Blend until well chopped. Add 2 Tbsp olive oil, the ricotta, and a generous pinch of salt. Process until you have a fairly smooth, bright green paste. Reserve.
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3
Prepare the glazed onions and pears. Peal the onion and slice into 1/4 inch slices. Half and core the pear and slice into 1/4 inch slices. Heat a large skillet over medium high heat. Add 1 Tbsp olive oil. When the oil is hot, add the onion and pear slices in a single layer and allow to cook a few minutes until they start to brown on one side. Flip the pieces and drizzle the balsamic vinegar over them, as well as a pinch of salt and grind of black pepper. Cook briefly to let the vinegar cook down into a syrup, and then remove the slices to a plate, pouring over any remaining vinegar.
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4
Preheat the oven to 475 degrees and insert a pizza stone if you wish. Roll out the pizza dough into a thin sheet, approximately 15 inches in diameter (you can spare a quarter of the dough for a small auxiliary pizza is you like). Sprinkle a pizza peel or baking sheet with polenta and place the dough on top. Spread the kale pesto in a thin layer over the dough. Layer the glazed pears and onions over the kale pesto. Crumble the gorgonzola and sprinkle on top. If using a pizza stone, carefully slide the pizza from the peel onto the stone. Bake the pizza for about 16 minutes until the crust sounds hard when tapped and the ricotta in the kale pesto has cooked through and lightened in color. Serve at once.
