Spinach and Cheese Bourekas

Ingredients

• 2 tablespoons olive oil
• 3 cloves garlic, crushed
• ½ teaspoon red chili flakes
• 10 bunches of spinach (about 5 pounds), cleaned de-stemmed and dried
• 1 teaspoon kosher salt
• ½ teaspoon ground black pepper
• 1 pound feta or bulgarian cheese, crumble
• 2 ½ cups all purpose flour
• ½ teaspoon kosher salt
• ½ teaspoon sugar
• ¾ cup plus 3-5 tablespoons room temperature water
• 2 tablespoons vegetable oil
• 1 cup melted butter, room temperature
• 1 egg yolk, beaten
• Flaky sea salt
• Sesame seeds