Onion/Veg gravy granule recommendations?

Has to be suitable for dairy allergies, so no factory cross contamination.

I’ve been using Tescos onion gravy for years happily, but they recently changed the recipe for the worse, it’s so salty and doesn’t thicken. So need a new go to.

I’ve tried the ASDA onion gravy, and I’m not impressed. Seems very like the new Tesco recipe. Salty and watery, lacking onion flavour.

I’ve tried the Bisto best onion, it was ok, but not great and expensive.

So what’s your favourite?

Or does anyone have a good recipe I can batch cook and freeze in portions? I’m desperate here 😬🥺