Cook in bulk a couple of times a month and freeze it. It saves most of the day to day hassle and provides you with readily available good food (provided you always remember to get something out of the freezer to defrost the day before).
I buy 5kgs of chicken breasts from the butcher which works out to be about 20 of them. Poach that all in vegetable or chicken stock and freeze it in bags of 2.
Then you can do whatever you want with it after that. @Despade a super quick ultra low carb option is to put 1 or 2 in a microwavable dish with a lid with some fresh kale and a splash of water then in the microwave on high for 2 minutes to steam the kale and defrosted breast. Drain it and cover it with a tablespoon of almond butter and loads of black pepper and a bit of salt.
Also I get some really cheap cuts of beef 2.5 Kgs of shin for example or tail and make a beef and potato stew with that, (you could leave the potato out to make it low carb) then I divide it into about 10 portions and bag it up and freeze it. After it's defrosted I put in in the microwave with some frozen broccoli and cauliflower for 5 minutes.
For something pretty much instant you can mash banana, add some chocolate protein powder and some rolled oats then fry it in coconut oil to make chocolate and banana oat pancakes. It honestly takes less than 5 minutes including preparation.