Bring water, freekeh, and salt to a boil in a medium saucepan. Reduce heat to medium-low, cover, and simmer until water has been absorbed, 15 to 20 minutes. Set aside.

While the freekeh is cooking, heat oil in a pot over medium heat. Stir in onion; cook until softened, 5 to 7 minutes. Add eggplant and cook, stirring frequently, about 10 minutes. Add tomatoes, russet potatoes, carrots, sweet potato, cumin, coriander, turmeric, salt, and pepper. Reduce heat to medium-low heat and simmer, covered, about 30 minutes. Add cooked freekeh and simmer for 10 minutes more.