I'll second the chaffle recommendation. Chaffle tuna melts were one of my favorite meals while on keto. Two chaffles, tuna, slice of cheddar cheese, mayo, a little spinach, a couple cucumbers, black pepper....so good. Forget the brand, but most grocery stores sell a mini waffle maker for about $10-$15, perfect for sandwich sized chaffles. Enchiladas were also a favorite with the low carb tortillas.
Fell off the wagon about 6 months into it, went on a two week vacation without a ton of control over my meals and just couldn't get back into it when I got home. Been planning a return to keto pretty soon, not sure why its been so hard to get back on it, I never felt better.