You may want to consider getting a glucose meter if you can afford it to test before and after meals to see how your diabetes handles different foods. It's unbiased and just tells you what is.
What about upping the fats and proteins instead of the carbs? Full fat Greek yoghurt, bacon and eggs, cheese, cream, etc.?
Have you already have a read of this informative blog written by
@JoKalsbeek ?
There’s a few things you should know. 1. Practically all carbs turn to glucose once ingested , so not just straight sugars, but starches...
josekalsbeek.blogspot.com
There's a thread where we share what we've eaten in the low carb section of the forum, it's been going for 9 years, so simply scroll back to see what type of foods people had in winter for inspiration.

Some people on the thread eat low carb to keto levels, others eat more moderately low carb.
https://www.diabetes.co.uk/forum/threads/what-have-you-eaten-today-low-carb-forum.75781/page-3166
Oh, and celeriac is great in winter, very low carb!
I use cauliflower instead of potato for mash, doesn't taste like cauliflower, and with a generous knob of butter and some cream cheese or cream mixed in before blitzing it's both low carb and filling.