I have written my approach elsewhere, but it fits precisely into your question. Here goes:
"Rest days" are not truly rest. They are usually very high in LISS, as I am usually doing a lot of farm work or taking a hike/snowshoe walk somewhere. On these days, I tend to keep carbs pretty low if possible, usually around 50g.
"Training days" are when I do heavy lifting. I tend to train fasted with BCAA, then lift, then eat a pretty heavy meal with about 100g of carbs after. It is almost always the same meal, a GF steak bowl with veg, hot sauce, and white rice.
On days where I am trying to perform, such as for a rugby game, race, Strongman comp, I will actually eat breakfast for once and load up on carbs, usually potatoes and fruit.
"Man is born free.....but everywhere he is in chains."