Welcome! I have a 5-year-old so I can tell you all about temptation, LOL. He loves peanut butter and jelly, pretzels (one of my past favorites), and a myriad of other things that I previously loved to eat.
However, he also has a great love for salad, nuts, berries, vegetables and a lot of other LC foods.
So, here's how I did things. At first, I told him that he just couldn't have a particular food right now (like pancakes), that later on when I could eat more carbs and came up with an LC pancake recipe, that we would all have pancakes again. That made him very happy. I bought things for him that the rest of the family doesn't really care much if they eat or not. For example, he loves 'Kettle Corn'. Well, I'm a popcorn fiend, but I can't stand Kettle Corn (lousy knock-off of caramel corn). He also loves boxed mac & cheese, which I think is pretty yucky, anyway. Once in a while he gets some of this kind of food, in addition to the occasional sugary drink--after all, kids need their carbs. However, on the whole he doesn't eat nearly the junk he did before. If he wants a cookie, he can have a cookie, but it's when we're in town and I buy him one of those two-cookie-packs, and he gets to eat one cookie and save the other for later. We do this with chicken nuggets and fries, too. If we're in a fast food place, then he can have that if he wants. Of course likely as not, he's sharing half my salad and leaving half his fries, LOL. But this way it's not in the house and no one else has to deal with it.
By the way, I did make an LC pancake recipe and he absolutely loves it.
Now, though, for the rest of us, the thoughts of eating most of the foods we did previously don't sound tempting at all. I ate one of the little guy's fries one day while we were at a fast food place, and it really was just downright gross! LOL