I must admit to you that I do not advocate fasting for fat loss or for any other reason. In my opinion, fasting eventually leads to increased fat stores, because the body naturally responds to food deprivation by deciding it needs to store even more fat in case it is deprived of food again. Fasting also harms your pancreas. Truly, I would discourage you from abusing your body in that way. Fat is there for a reason. I try to leave it be, and concentrate instead on just avoiding overeating, because that is when I can add more fat, especially to my poor liver.
I am not much of a cook either. Looking at your list of foods, I believe that I would thoroughly enjoy eating those vegetables just as they are. I love to sit by myself with a good book while I eat an concentrate on nothing but crunching away on those delicious fresh vegetables!
4 meals of 500 calories would be easier on your system. When I am combining foods, I try to make the ones I don't like more inviting by combining them with my favorites. Could you do the same for yourself? You don't really have to cook, just take a bite of the one you don't love so much and cover it up by taking a bite of your favorite to chew at the same time. And save a bit of one of the favorites to enjoy as the very last bite, by itself.
I would grind the chia seeds in a coffee grinder if one is available, in several batches of one or two tablespoons, and mix the powder with water or any other available liquid to make a pudding of sorts. You could even coat your eggplant with the chia seed powder. Or mix some into the sweet potato. I have even eaten sweet potatoes raw. You could slice it and dip the slices in the chia seed powder. Not pretty but if you are hungry everything tastes good!
1 oz of kelp is actually a lot. Will you start with dry and rehydrate it? I have eaten cut wakame rehydrated and raw but I have always cooked kelp after rehydrating. I think the kelp would taste good with the sweet potato and spinach, and maybe the hemp seeds