Homemade Vegan Worcestershire Sauce

Ingredients

2 cups apple-cider vinegar

1/2 cup soy sauce
1/4 cup light-brown sugar
1 teaspoon ground ginger
1 teaspoon ground yellow mustard seed or dry mustard
1 teaspoon onion powder
1 clove garlic, crushed
1/2 teaspoon ground cinnamon
1/2 teaspoon freshly ground black pepper

Instructions
Place all ingredients in a medium saucepan. Bring to a boil over medium-high heat; reduce heat to a simmer and cook until liquid is reduced by half, about 20 minutes. Strain through a fine-mesh sieve and let cool completely before using. Worcestershire sauce may be stored in an airtight container, refrigerated, for up to 3 months.
Yield: Makes about 1 cup

I found this recipe on Martha Stuart website. It's good but  would only use 1/4 tsp. of dry mustard unless you love a mustard tasting  Worcestershire sauce