Chicken in Cilantro Sauce

Source: Los Barrios Family Cookbook

This makes a delightful brunch or lunch dish. It's very easy to prepare, and it will wow your guests.

6 skinless, boneless chicken breasts
1 bunch cilantro, tough stems removed, finely chopped
2 to 3 serrano chiles, to taste
1 (10 ounce) can evaporated milk
Salt and pepper, to taste
2 tablespoons vegetable oil
1/4 onion, sliced

Place the chicken breasts in a large pot, add water to cover and bring to a boil. Reduce the heat and cook for 30 minutes. Drain thoroughly. Transfer to a serving platter and cover to keep warm.

Meanwhile, combine the cilantro, chiles, milk and salt and pepper in a blender and blend thoroughly, 2 to 3 minutes.

Heat the oil in a medium saucepan over medium heat. Saut