Leftover Turkey Curry

Name: Leftover Turkey Curry
Ingredients: 3 tablespoons safflower oil or butter; 1 small onion, thinly sliced; 1 tablespoon minced garlic (from 2 large cloves); 1 tablespoon minced peeled ginger; Kosher salt; 1 tablespoon tomato paste; 1 teaspoon ground cumin; 1 1/2 teaspoons ground coriander; 2 Yukon Gold potatoes, peeled, cut into a 1-inch dice; 2 1/2 cups no-sodium-added chicken broth; 1 Thai chile, split (seeds removed for less heat, if desired), plus more, sliced, for serving; 2 cups coarsely shredded cooked turkey; 1/4 cup plain yogurt (not Greek), plus more for serving; Cooked basmati rice and fresh mint or basil leaves, for serving