Vegan chicken is usually soy protein and a ton of vegetable oils. It makes me feel bad on a normal day. Maybe try eating regular chicken instead or just having beans. Maybe also consider grapes and muffins are high in sugar which will spike your insulin.
its a parasympathetic response, rest and digest.
breaking fasts tends to cause sleepiness, which is why they should be broken in the evening so that you can sleep it off. in my experience, the sleepiness lasts within 2 days of eating.
If I’ve been carb-free for more than a day and then indulge in sugar my bowels ache, my stomach hurts, I have less energy and I feel mentally like crap. I don’t know about anyone else but sugar/carbs make me feel just all around awful.
Honestly it’s probably the fact you’re eating to many plant foods/carbohydrates. SIBO and other gut disorders can arise in long term plant based diets. You sound like you have a very mild case
You should at the very least look into adding a significant amount of healthy vegetable fats like Olive Oil and coconut oil. That will likely help alot.
But it probably would be best to add in animal proteins as well but I understand you being vegetarian this isn’t really an option.
Maybe something like eggs would do from an organic free range farm. Most grocery stores now-a-days have them.