1 tbsp. good quality oil (olive, grapeseed,etc.)
1 medium onion, diced
2 or 3 cloves of garlic, finely chopped
1 ½ cups ketchup
1/3 cup maple syrup
red pepper flakes to taste (optional)
1 tbsp. Dijon mustard or grainy mustard
¼ cup apple cider vinegar
1 ½ cups apple cider, beer or hard cider
¼ cup soy sauce
In a heavy-bottomed sauce pan, heat oil over medium heat and sauté onions until translucent. Add garlic and cook for a minute or two. Add a bit of salt and pepper, but not too much. Soy sauce is quite salty!
Add ketchup and maple syrup. Cook, stirring occasionally until the mixture becomes caramelized and quite thick and brown.
Pour in remaining ingredients and allow to simmer until thick and mixture is the desired consistency.
After the mixture is reduced, taste and adjust the seasoning, adding more salt, pepper, vinegar to balance the flavour.
Because the mixture reduces, the flavours concentrate, so leave the adjustment of seasoning to the end of the process.