If one is like me, NOTHING keto is even remotely similar to potatoes, bread or even rice. I don’t even get the last one, rice barely has a flavor - but nope, impossible to replace. Because potatoes have a very unique, distinct potato flavor, nothing else has it, that’s simple.
I just had to give these up (or eat them very occasionally. but bread is triggering for me so if possible, not. definitely not the full carb version I make for my SO).
I have found nothing low-carb is ever like a high-carb item even if the carby ingredient isn’t even flavorful. Sometimes it’s the texture (bread has its special own texture that just can’t happen without some starch), sometimes who knows but I tend to feel very clearly if something is carby or not, sugar ius easy to replace with sweetener unless one hates them all but starch… It can be tricky without. Of course, if a baked stuff has lots of non-carbs to begin with, it’s easier to replace the little flour without big problems but a simple bread… It’s better to forget about it. If one is like me (or my SO who can’t even eat my favorite, hybrid bread that has half flour, half other things as “flour”!). But if a keto bread works for someone, good for them.
But it’s fine if we can’t make the replacement similar to the original. Sometimes it’s not what is really important. Sometimes we just want to put our spread and sausage slices on something and call it a sandwich, it doesn’t need to be similar to bread at all I strongly prefer my carni sandwiches but I never liked bready ones. And it was so good and comforting that while I “lost” some food groups and old fav dishes, I gained even better ones. So it can be a good deal.
There are so many possibilities on low-carb, keto, even carnivore! It’s fun to explore and experiment. Changing our diet shouldn’t be something unpleasant that we force on ourselves for a reason. But many people seem to think and feel that. That’s sad. I can be VERY creative if it’s about my food joy so I never accepted a disappointing woe. And I am not super choosy either, thankfully and always loved the right food too… That surely helps a lot. But we can change. A surprisingly lot sometimes.
There are ways, options. I am SO very much rooting for the OP’s wife! I can be a wonderful change on multiple levels.