Keegan's Grill Tomatillo-Poblano Sauce

1 ounce olive oil
6 ounces yellow onions, finely diced
8 ounces poblano chiles, diced
1 tablespoon garlic, minced
8 ounces tomatillos, husked
2 cups chicken stock
Cumin powder to taste
2 teaspoons granulated sugar
Salt to taste
Pepper to taste

Saut