eggplant, spinach and tomato sauce

Ingredients

• 2 pounds eggplant, peeled and diced
• 1 pound fresh spinach, washed, stemmed and chopped
• 2 pounds tomatoes, blanched, peeled and chopped
• 5 tablespoons ghee
• 1-2 - dried chilies, crushed (or red pepper flakes)
• 1 teaspoon ground coriander
• 1/2 teaspoon ground cumin
• 1/2 teaspoon ground turmeric
• 1/2 teaspoon asafetida
• 2/3 cup water
• 1 teaspoon brown sugar
• 2 1/2 teaspoons kosher-type salt
• 1/2 teaspoon garam masala