Mix salt, cumin, paprika, pepper, and chili powder in a small bowl. Set aside.
In a large bowl, add eggplant, onions, tomatoes, long hot peppers, yellow pepper, taro, and red pepper. Sprinkle on the spice blend. Pour the oil over the bowl and mix until well combined.
Distribute in one even layer on a large parchment-lined baking pan. Bake at 400° for 40-45 minutes, or until golden. Turn pan about halfway through. Plate and serve immediately.