BUCKWHEAT CREPES WITH SPICED-CHICKEN FILLING

Steps:

• Filling
• Sprinkle chicken all over with coriander, cumin, and 1½ tsp. kosher salt. Heat oil in a large skillet with high sides or a large pot over medium. Cook chicken, skin side down, until golden, 6-8 minutes. Turn and cook on second side until golden brown, 6-8 minutes. Transfer chicken to a plate.
• Pour off all but 1 Tbsp. fat from pan. Add carrots, celery, and cinnamon sticks and cook over medium heat, stirring occasionally, until softened, 6-8 minutes. Stir in orange juice and 1½ cups water, scraping up any browned bits.
• Remove skin from chicken thighs; discard. Nestle chicken back into pan and add any accumulated juices on plate along with 4 parsley sprigs. Bring to a simmer, cover, and cook 30 minutes. Uncover and continue to cook until sauce is slightly reduced and chicken shreds easily, about 15 minutes more. Transfer chicken to a clean plate. Pour braising liquid through a fine-mesh sieve into a medium bowl, pressing on solids to extract juices; discard solids.
• Pour 2 cups braising liquid back into pan. Bring to a boil and cook until reduced by a quarter, about 5 minutes. Stir cornstarch and ¼ cup cold water in a small bowl until smooth. Whisking constantly, pour slurry into braising liquid in a slow, steady stream. Continue to cook, whisking occasionally, until sauce thickens, about 2 minutes. Remove from heat.
• Separate chicken meat from bones; discard bones. Shred meat, discarding any fatty parts, and add back to sauce; toss to coat. Finely chop leaves of remaining 4 parsley sprigs; stir into sauce. Taste and season with more salt if needed. Cover and keep warm. Do ahead: Sauce can be made and chicken shredded 3 days ahead. Transfer sauce and chicken to separate airtight containers; cover and chill. Add chicken to sauce and reheat together over medium-low just before serving.
• Crepes and assembly
• Pulse oats in a blender until finely ground. Add egg, buckwheat flour, kefir, salt, 1 Tbsp. oil and 1¼ cups water and blend until batter is smooth.
• Heat an 8" nonstick skillet over medium; brush lightly with oil. Pour 3 Tbsp. batter into center of pan; swirl pan to spread batter evenly into a 6"-8"-diameter crepe. Cook, undisturbed, until surface looks dry, bottom is golden brown, and sides easily separate from pan, about 2 minutes. Using a thin heatproof spatula, gently flip crepe and cook just until lightly golden, about 30 seconds. Transfer to a plate and repeat process with remaining batter, stacking crepes as you go and brushing pan with more oil every 3-4 crepes. Cover crepes with a clean kitchen towel to keep warm while you work.
• Working one at a time, spoon ¼ cup filling onto each crepe. Fold side nearest to you up an over filling to cover by about two thirds (you should see some of the filling poking out at the top). Fold in one side and then the other to make a triangle-shaped packet.