Preheat your oven to 176 C / 350 F degrees.
Place 1/4 cup of the olive oil in a large sauté pan. Over medium high heat, salute the onions and the salt until the onions are translucent and fully cooked but have not begun to brown.
Add the tomatoes and fry until the tomatoes make a sauce but do not lose all their form.
In a separate pan, add the remaining ¼ cup olive oil and currants and fry over medium heat until the currants are puffy and brown.
Add the pureed chipotle chiles. Mix well and remove from heat.
Add the currant mixture to the sautéed onions.
Add the shredded chicken and adjust the salt.
Cool the mixture in the refrigerator before filling the pie.