I've just been using regular old non-vegetarian fish sauce in all my cooking so far. (I got a bit bottle ages ago and I'm still working on using it up.) The folks at America's Test Kitchen recommend Bragg Liquid Aminos as a good vegetarian option when you need to substitute fish sauce. They also suggest this recipe as a good homemade alternative.

Vegetarian Fish Sauce Substitute

From The Complete Vegetarian Cookbook by America's Test Kitchen

Ingredients

• 3 c. water
• 3 Tbsp. salt
• 2 Tbsp. soy sauce
• 7g dried sliced shiitake mushrooms

Directions

1. Combine all of the ingredients over medium heat and simmer until mixture is reduced by half. (~30 minutes)
2. Strain and cool completely.
3. Store in fridge for up to 2 months.