Everything sounds fine except for fasting can increase the amount of cortisol. Our cortisol are high in the morning can be partly due to not having anything for a few hours but most of the case, it is not so. You should know that to sleep, we need melatonin and to wake up we need a sufficient level of cortisol enough to woke us up. That's why if people have depression they will be having early awakening (it's hard for the to sleep and hard to stay asleep). If you want to control the level of cortisol in the morning, eating is just one of the way to do it but it's not the only way. Exercise and meditate can reduce cortisol much better in that sense. Fasting will not make your cortisol increase that much or else, intermittent fasting (16 hours fast - 8 hours eat) will not be one of the famous way to lose weight. Insulin is an anabolic hormones, and it's one of the cause of weight gain among people so the key is to control that.