omelet might be easier for finger food, I use one of those dinky one-egg pans, it is amazingly fast to whip up an egg. I use some veg oil and just the beaten egg (no water or milk added), after a little cooking I fold the omelet in half in the pan whilst the inside is still a little wet so the two halves stick together making a much fatter omelet which is easier to cut into fingers/chunks. (and let it cook on low half a minute, turn and cook through from the other side too)
fish - how about the packs of fresh fish sold for fish pie? A little variety of a few different types of fish already cut into finger food sized chunks. For a LO like this I would just drop a couple into a small pan of water to boil, it would be cooked in moments. I sometimes use those fish pie packs, I take a few mins to re-pack the pieces into DS sized portions (here it's say 3 pieces of fish per meal) in freezer bags so that day-to-day I can just pull one bag from the freezer to thaw. I don't use a microwave but I'm sure you could micro a couple of pieces.
for instant food how about pre-cooked canned beans (the ones in just water no sugar/salt) such as chickpeas black eyed beans, kidney beans, pinto, butter beans? If he is practising pincer grip he'll have fun picking them up and literally all you have to do is open the can and rinse them in a sieve. You can also whizz/mash them (preferably with an egg once you've trialled, add any left over veggies) and fry off patties or fill a mini muffin tray and shove it in the oven for them to set into handy LO-sized portions which can be frozen. I really don't think home baking/cooking needs to be fancy recipes or a load of faff, I would just aim to produce a batch of something which will fill him up and be as convenient as possible for you.
coconut - have you tried the small sachets of coconut milk? They come in a box of about 4 sachets, maybe this could be an option for some sort of baking or adding coconut to other things if you wanted? You'd get the coconut without all the water iyswim. It says to melt the contents by dropping the sachet into hot water for a few mins but actually if it's not the middle of winter (and really cold) you can just open the pack and spoon out the contents.
http://pataks.co.uk/products/creamed-coconut.aspxthere's an oaty chew recipe here
Re: Finger Foods (6 months+)Use oil and a bit of water, no need for butter/milk and just add whatever flavours/fruits you know are ok. For dried fruit you can whizz it up (fruit and oats) to make the whole chew smoother. These really are very easy and super fast to make. And freeze great, I always felt like they were convenience food because I could lift a few out and pop them in a tub to take out and they would defrost by snack/lunch time.
You could try one with grated carrot or sweet potato which would be something like the Goodies oat chew
http://groceries.asda.com/asda-webstore/landing/home.shtml#/product/37913973?&cmpid=ppc-_-ghs-_-pla-dsk-_-google-_-(the shop shelf chews have allergy warnings on but if you look at the ingredients it is basically the same as the basic oat chew recipe but with various fruit/veg/juice added for the variety of flavours they stock. I sometimes bought the Goodies packs, they are smoother than plain oats but if you whizz the oats before you start it comes out very similar)
Another pre-made baby food is cow and gate, again I've not used but they have a couple of dairy/gluten free foods:
http://www.cowandgate.co.uk/products/baby-food/from-10-months#lunches-and-dinners
