This is a really good question because I was asking myself that just the other day. I was saying to my wife that I miss vegan food and want to eat it a couple of times a week. My wife agreed, but that meant I had to remember my recipes (which, alas, I never wrote down... yeah... I'm an idiot... When I was young, I thought "Oh it's all about technique, not ingredients, and I'll never forget this technique!"... yeah... stupid).

Anyway, one of my go to dishes was a lentil stew with kale. I don't know why kale tastes good in lentil stew, but it really does. Some of the main things to keep in mind when doing vegan food is that you are going to be missing umami. The other thing is that most vegetables are sweet and when you make entire dishes out of vegetables, the dish will tend toward sweet. What you want to do, when you get the chance is to trade sweet for umami. You can also balance sweet with bitter (maybe why kale tastes good) and sweet with sour. Umami shows up in fermented food and seaweed, but also in things like tomatoes. You can also caramelise onions until they are quite dark, which cuts the sweetness down and gives you more depth of flavour.

Generally alcohol is your friend and fermented foods like miso or shoyu (naturally fermented soy sauce) have tonnes of umami. They also break down the proteins into many different amino acids, so can play the same role in delivering flavour that cheese can. Try to find traditional producers that have aged varieties, because you'll have more amino acids, more umami and more alcohol. I use a 4 year old soy sauce when cooking (though probably impossible to find in North America). Your default should be Kikkoman, which is fermented for at least a year (and will probably be called Tamari outside of Japan, even though it isn't). One other quick thing about alcohol is that some flavours only dissolve in alcohol. Adding alcohol really helps because you can dissolve those flavours and then evaporate off the alcohol, leaving the flavour behind. When using alcohol, use the best that you can afford (which is usually whatever thing is taxed less in your country -- in Japan, whiskey is oddly efficient).

I learned how to cook, originally, from the 3 volume "Mastering the Art of French Cooking", so I err on the side of relying on soup stocks for things. Making a good soup stock is super important and is one of the things I recommend practicing a lot. You can buy soup stock, but especially for vegan cooking you need to be able to pack a lot of flavour and you need to avoid the sweetness. Again, you can use tricks of roasting your veggies ahead of time and experimenting with different kinds.

I also (for a long time) have used Japanese kombu dashi and also shiitake dashi. Basically, you soak kombu seaweed in water overnight in cold water, then bring the temperature of the water up until you just start to see bubbles rising from the kombu, take it off the heat and hold it for about half an hour. To make shiitake dashi, you add dried shiitake mushrooms to it at the same time you added the seaweed. Of course, after the stock is made, you should remove the seaweed and mushrooms and do something else with them. With this you can make a very nice umami stock (just add miso for miso soup) For the seaweed, as a side dish (especially for when you are drinking), roll up the seaweed and then slice it as fine as you can. It will get very slimey. Add a touch of hot sauce, vinegar, soy sauce and a drop of sesame oil. Mix it up and let it sit in the fridge for a while. Very high in iodine and if you eat that kind of thing every day, you don't need iodised salt. (Be careful if you have a thyroid problem, though!)

So for a stew, the idea is that you want to layer these flavours. You can caramelise an onion, then add some tomato paste (or whatever scraps of tomatoes you might have around) and fry it down. Add some garlic (and potentially some grated fresh ginger). Then add the lentils and add your normal soup stock with a splash of some alcohol (red wine, beer, whisky, etc Careful with adding too much beer because it can be bitter. Same with wine because it can be sour). Cook it rather thickly until the lentils are done, with some herbs (whatever you like: maybe bay laurel, rosemary and sage -- that's a pretty "meaty" combination). Add some shiitake dashi to thin it out and salt using a combination of miso and salt (whichever proportion tastes good to you). Also mix in the rehydrated shiitake from the dashi -- they have a nice texture in the stew. Add some kale and cook until it has a texture you like. Readjust salt (the kale soaks up a lot). Finish with freshly ground pepper. Hopefully that will taste good. It's been a donkey's age since I made it and I might have forgotten something. Serve with rice.

Another good candidate is actually ramen. I could write pages on this, but again take your stock, shiitake dashi and mix it 50:50 with soy milk (yeah, it's strange). Mix in grated garlic, ginger and miso paste (enough so that the whole thing is a bit saltier than you would like). Add black pepper and as much hot sauce as you like. Cook up some angel hair pasta in another pot. When done, put the pasta in a basket put a lid on it and shake off the excess water (very important). Put the pasta in a big bowl. Pour the soup over top (should be very hot) until it just covers the pasta. Add menma (lactic fermented bamboo strips), some cooled and squeezed out spinach (you can use frozen spinach, microwave it to thaw and then just wring out the juice -- which you can save for something else), and a single piece of nori seaweed. You can also put in that reconstituted shiitake in as well if you have any. Cover with a generous portion of sesame oil (at least a couple of teaspoons). This is surprisingly awesome (IMHO).

Hope that gives you some ideas!