Chicken Tinga Empanadas

Name: Chicken Tinga Empanadas
Ingredients: 2 tablespoons olive oil; 1/2 onion (halved and thinly sliced); 1 pound ground chicken or turkey; 1/2 teaspoon salt; 1/2 teaspoon Mexican Oregano; 1/3 cup chipotle sauce or 4 chipotles in adobo sauce (finely chopped); 2/3 cup tomato sauce; 1 cup Mexican cheese blend; 1 package puff pastry or homemade Empanada dough; 1 egg (beaten); 1 large avocado (peeled, pit removed); 1/2 cup Mexican Crema; 1/4 cup fresh cilantro (chopped); 1 teaspoon grated lime zest