Spinach and Feta Puff Pastry Parcels

Name: Spinach and Feta Puff Pastry Parcels
Prep time: 30 min
Cook time: 20 min
Total time: 50 min
Cuisine: European, Mediterranean, Greek
Ingredients: 1-2 teaspoons olive oil; 150 grams fresh spinach (5 1/4 ounces; about 10 cups, not packed); 2 cloves garlic, peeled and minced; 1/8 teaspoon ground black pepper; 1/8 teaspoon kosher salt; Pinch ground cayenne pepper; 100 grams feta cheese (3 1/2 ounces), drained on a paper towel; 1 sheet store-bought puff pastry, thawed according to package directions if frozen; 1 large egg, lightly beaten; Sesame seeds, to decorate; Flour, for dusting rolling mat or countertop