INGREDIENTS
1 lb
Apples, tart
2 tbsp
Chives, fresh
1 tsp
Thyme, fresh
1 1/2 lb
Yellow onions
1
Egg beaten with
1
Kosher salt and fresh ground pepper
1
package Puff pastry dough, frozen
1 tsp
Sugar
2 tbsp
Vegetable oil
2 tbsp
Butter, unsalted
1 1/2 oz
aged gruyère cheese, coarsely grated