Sweet Potato and Avocado Empanadas

Name: Sweet Potato and Avocado Empanadas
Ingredients: 1 (17.3 oz) package of puff pastry dough (two sheets); - empanada filling (see recipe below); - poblano cream sauce (see recipe below); 1/2 cup cilantro, chopped; 2 ripe, fresh avocados, halved, pitted, peeled, diced and mashed lightly; 1 egg, mixed well with a little water; 1 1/2 cups sweet potato, diced; 1/4 cup onion, finely diced; 2 garlic cloves, minced; 1/4 cup olive oil; 1/2 tsp. salt (or to taste); 1 poblano pepper; 1 Tbsp. butter; - salt and pepper (to taste); 1 garlic clove, minced; 2 cups heavy cream