Gözleme With Kale and Cheddar

Name: Gözleme With Kale and Cheddar
Ingredients: 1¼ cups (156 g; or more) all-purpose flour; ½ tsp. Diamond Crystal or ¼ tsp. Morton kosher salt; ¼ tsp. baking powder; 4 Tbsp. unsalted butter, cut into ½ pieces, room temperature; 1 16-oz. package frozen kale, thawed; 1 bunch scallions, trimmed, finely chopped; 2 garlic cloves, finely chopped; Zest of 1 lemon; 8 oz. extra-sharp white cheddar, coarsely grated (about 2 cups); 1½ tsp. Diamond Crystal or 1 tsp. Morton kosher salt; ¼ tsp. crushed red pepper flakes; All-purpose flour (for dusting)