Chicken Curry and Roti

Name: Chicken Curry and Roti
Ingredients: 1 (3- to 4-pound) whole chicken, skin removed, cut into 10 pieces; Salt and cracked black pepper to taste; 1 bunch scallions, chopped, divided; 2 teaspoons dried thyme, divided, plus more for seasoning; 1 tablespoon vegetable oil; 1 cinnamon stick; 3 whole cloves; 2 cardamom pods, split; 4 wiri wiri peppers; 3 culantro sprigs, chopped; 1 large yellow onion, diced; 5 garlic cloves, grated; 2 tablespoons curry powder; 1 tablespoon ground cumin; 1 tablespoon West Indian garam masala; 1 tablespoon ground turmeric; 1 large tomato, diced; 3 large potatoes, quartered; 3 cups all-purpose flour, plus more for dusting; 1 teaspoon baking powder; ¼ cup vegetable shortening; 1¼ cups warm water; Vegetable oil, for greasing and brushing