Braised Chicken and Poblano Chiles

Name: Braised Chicken and Poblano Chiles
Ingredients: 8 (6-ounce) bone-in, skin-on chicken thighs , patted dry; 1 teaspoon black pepper; 1 tablespoon kosher salt, divided; 1 pound poblano chiles (4 to 5 chiles); 1 medium-size (about 10-ounce) yellow onion , thinly sliced (about 1 3/4 cups); 2 garlic cloves , finely chopped (about 2 teaspoons); 1 teaspoon ground coriander; 1 (15-ounce) can diced tomatoes , undrained; 1 cup water; Warm corn tortillas or mashed potatoes, for serving