@KarriB We've switched to zoodles, cauliflower rice and so on, for pasta and other starches. I also have a sheeter for my KA mixer, and I just bought the new noodle blade accessory for it, so will make a more noodely-noodle with that along with the spiralized noodles I make now. I haven't cooked any pasta at all, but I plan to occasionally cook a little brown rice in the future, and then keep the portion size small. We cut out casseroles also, along with processed sugar, sweets and all white flours. Any foods that have any kind of processed sugar in them are banished from my castle!
I do have pure maple syrup for the occasional homemade loaf of whole wheat bread I make (I use 2 tsps for an entire loaf), and some raw honey (plus a little of the maple syrup) I use for my husband's little bowl of homemade granola he eats for breakfast some days. (It's not totally low carb but it's better than what he used to eat so I allow it)
I wanted to see if I could steadily lose the weight I gained after my TKR and revision from not being able to do anything, and with still being unable to be fully active, and I'm proving it can be done. It's not easy, as I'm sure you well know, but it is possible. In three months I've lost 20 lbs, and plan to continue until I look like myself again.
Your left knee is just waiting for the day you replace it, then it'll serve you well, as does the right one now. Then you'll have two wonderful knees that will take you on many adventures!