Another low carber here.
Cut down the toast and roast potatoes gradually. Have half the usual amount for a few days then halve that and so on.
I sometimes have one slice of Hi-Lo Seeded Wholemeal toast for breakfast. Other days I have a late breakfast (in a cafe) with fried bacon egg and mushroom. Lunch and dinner will consist of fish, chicken, beef steak, gammon or egg with a selection of veg and salad leaves. If things have a covering of pastry, batter or breadcumbs, I just eat the filling. I rarely get hungry between meals. I don't crave carbohydrates either because I know I don't need them. Avoiding the high carbohydrate stuff means that I don't need to inject much insulin to cover the meal.