In a medium saucepan, heat olive oil until it begins to shimmer; sauté onion for 2-3 minutes. Add tomatoes, tomato paste, molasses, mustard and vinegar. Stir and bring to a boil; reduce heat to medium and simmer for 3-4 minutes.
Add the remaining ingredients and stir until incorporated. Simmer for about 30 minutes, until sauce has reduced by half. Cool for 30 minutes. Remove bay leaves; purée in a blender until smooth. Slather over whatever you’re grilling.
Sauce will keep, refrigerated, for up to a month. Makes 4 cups (1 L).
Gluten detective
Check the label on any canned or processed product for potential sources of gluten; if in doubt, check the company’s website, or contact the company directly. Similar products may have different formulations in different countries, so be sure to check the Canadian information; also note that companies often change their formulations and processing conditions without warning, so don’t assume that gluten-free products will continue to be GF.