She could start keto + rice. I mean, do everything else as if keto, plus the rice. Then, week by week, decreasing the amount of rice.
Blood glucose (BG) spikes will come from the rice and as she’d decrease it, it’d only become better and better.
I think I’ve understood that for many people, if you eat the rice with fat, the BG spike is lesser than without the fat. The BG spike also depends on the amount of carbs in the meal.
Besides that, I’d add in intermittent fasting to have more time with low BG and low insulin.
If you don’t have a BG meter, consider getting one. Just remember that even if BG didn’t get too high after a food, it doesn’t mean insulin was low. I’ve read that one can have low BG, but at the cost of a lot of insulin and that isn’t good either.
The keto + rice would be then a low carb WOE. With the intention of making it lower and lower in carbs, to approach a very low carb WOE, perhaps even a real keto in the future, if she can get used to no rice with time.
If you do try stuff like konjac rice/pasta: the one I can find here smells like fish when you open the pack. Wash it, throw a bit of cheap vinegar on it, swish it around, then wash it again. The bad smell is gone. You can do this washing and keep it in the fridge for 2 days. Perhaps more, but I’ve only tested cooking for 2 minutes after washing and keeping leftovers for one day. It was fine. I didn’t like the rice, but the pasta is ok. I have it sometimes, with cheese and meat. Tasty!
Edit for a giggle: when will Uncle Roger test egg fried konjac rice? Lol