Potato Knishes Baked Onion - Recipe By Me

Ingredients

• 1 cup all-purpose flour, sifted
• 1/3 cup water
• 2 teaspoons vegetable oil
• Pinch of salt
• 3 pounds Russet potatoes
• 1 yellow onion, finely diced
• 1 bunch scallions, finely sliced
• 2 cloves garlic, minced
• 1/2 cup vegetable oil, plus additional for brushing and roasting
• 1 to 2 teaspoons salt, or to taste
• 1 egg yolk
• 1 tablespoon water