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1
Place cilantro leaves, garlic, 2 tablespoons olive oil, toasted almonds, yogurt, lemon juice, salt, and pepper into a food processor. Pulse until mixture becomes a paste-like pesto, 6 or 7 pulses.
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2
Mix all-purpose flour and whole wheat flour together in a bowl. Mound flour on a work surface such as a large wooden cutting board. Create a well in the center of the flour; add 4 eggs and 1/2 teaspoon olive oil into the middle of the well. Beat the eggs and olive oil and gradually begin incorporating the flour a little at a time using a fork, lifting flour up from the sides until most of the flour is incorporated into the eggs. Shape into a ball. Knead dough until it is elastic, 5 to 10 minutes, adding additional flour if it is too sticky.
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3
Roll dough out into a large rectangle about 1/16 inch thick. Cut into 8 6x6-inch squares.
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4
Mix ricotta cheese and Parmesan cheeses together in a small mixing bowl. Transfer to a piping bag or plastic bag (cut a small piece off a corner of the bag). Pipe a small circle of cheese mixture large enough to hold an egg yolk in the middle of 4 of the dough squares. Place an egg yolk in the center of each circle.
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5
Mix 1 egg white and 2 teaspoons water together in a small bowl. Brush egg wash on edges of the pasta squares outside the egg yolk circle. Carefully place remaining 4 pasta squares on the egg yolks. Gently seal edges and try to eliminate any air pockets. Use a 6-inch round cookie cutter to remove the corners of the squares. Press edges of ravioli with tines of a fork to strengthen the seal.
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6
Fill a large pot with lightly salted water and bring to a rolling boil; reduce heat to medium-high so water is just simmering. Carefully transfer ravioli to water; gently stir. Cook until pasta is tender, about 3 minutes. Remove with a slotted spoon and place on 4 warm serving plates. Serve topped with a spoonful of pesto.
