Thai Tofu & Winter Squash Stew

2-3 leeks, white parts
2 tbspn oil
2 garlic cloves
2 serrano chiles, minced
1 tbspn finely chopped ginger
1 tbspn curry powder
1 tspn light brown sugar
3 tbspn mushroom soy sauce
1 (15 oz) can coconut milk
1 tbspn fish sauce
1 1/2 lb butternut, peeled and diced into cubes
salt
1 10 oz. tofu, cut in cubes
1 lime juiced
1/3 cup raw peanuts
1/4 cup chopped cilantro

-Cut leek whites in half, then cut them crosswise into 1/4 inch pieces.  Make sure there is no dirt/sand in them, wash.
- Heat oil in soup pot, add leeks and cook over high heat, stir often, until softened, 3 minutes or so.  Add garlic, most of the chilis, ginger, cook for a minute, then add curry, sugar, soy sauce.  Reduce head to medium.  Add 3 cups water, coconut milk, fish sauce, squash, teaspoon salt.  Bring to a boi, lower heat and simmer, covered, for 15 minutes.  Add the tofu (you can fry a bit before to add extra flavor and texture, or add raw), to the soup once the squash is almost tender, then simmer, until it's done.  Taste for salt and add the lime juice.
-Fry the peanuts in a few drops of peanut oil, until browned, then coarsely chop.  Serve over rice, top with cilantro, peanuts and the remaining chili.