How to Make It
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and salt in a large bowl. Combine sour cream, water, oil, and egg, stirring with a whisk. Add sour cream mixture to flour mixture; stir until combined. Turn dough out onto a floured surface. Knead until smooth and elastic (about 7 minutes). Place dough in a bowl coated with cooking spray, turning to coat top. Cover and let rest 15 minutes.