Thai Hot and Sour Shrimp Soup

Ingredients

• 1 pound Shrimp -- Raw unpeeled Small
• 2 Stalks Lemon Grass
• 3 Whole Spring Onions -- cut into 1/2 inch pieces
• 1 Teaspoon Lemon Zest -- grated
• 1-15 Ounce Can Straw Mushroom
• 4 Whole Thai Chilies Hot cut into very thin rounds
• 5 Cups Chicken Stock Canned Is Ok, Use Low Salt
• 3 Tablespoons Fresh Coriander or 1 tablespoon dried
• 1 Teaspoon Soy Sauce
• 1 Tablespoon Fish Sauce
• 3 Tablespoons Lime Juice
• 1/4 Pound Extra Firm Tofu
• 2 teaspoons Chili Paste, Nam Prik Pow-(At Asian Markets)