Recipe: South Indian Okra Sambar Stew

Name: Recipe: South Indian Okra Sambar Stew
Ingredients: 6 fresh curry leaves; 7 tablespoons coriander seeds; 1 tablespoon cumin seeds; 1¼ teaspoons freshly ground black pepper; 1¼ teaspoons black mustard seeds; 1¼ teaspoons fenugreek seeds; ½ teaspoon poppy seeds; ½ teaspoon ground turmeric; ¼ teaspoon ground cinnamon; ½ teaspoon chana dal; ½ teaspoon toor dal; ½ teaspoon canola oil; ½ cup dried red chiles, crushed; 1 cup toor dal; 8 cups water, divided; Kosher salt; 1 cup finely diced carrots; 2 cups finely diced red onion; 3 cups whole okra, stems removed; 1 tablespoon canola oil, divided; 12 curry leaves; 2 teaspoons black mustard seeds; 2 teaspoons cumin seeds; 1½ teaspoons asafoetida; 1½ teaspoons fenugreek seeds; 2 to 4 serrano peppers, thinly sliced; 1 teaspoon ground turmeric; 2½ tablespoons sambar masala; 2 to 3 tablespoons tamarind purée; ½ cup canned crushed tomatoes