As a vegan and an Intermittent Faster I'm constantly experimenting with vegetable dishes, aiming for low calorie meals with maximum flavour. I also keep an eye on food miles, so most of my veg are local and in season.
I was very surprised when I discovered the depth of flavour already present in a simple veg stew:
Onion
Celery
Cabbage
Cauliflower
Carrots
Mushroom
Garlic
Tin tomatoes
A decent sized saucepanful can be made for around 250 cals, and, after simmering for a while, the flavour is delicious just as it is. However, I do go on then to add:
Bouillon powder
Mixed herbs
Pesto
Mushroom ketchup
Soy sauce
Worcester sauce (vegan, of course)
Tomato puree (like the sun dried tomato paste suggestion!)
Then there are all the spices - curry powder, smoked paprika, cayenne, that sort of thing.
I'll have that the first day - and if my wife (who isn't vegan) is joining me I'll include some soy mince early on in the proceedings, so that it takes on more flavour.
If I'm on my own, the following day I'll add chunks of seitan, red kidney beans and pearl barley (both of which I've got loose in the freezer), plus dried chillies, etc. I'll have this with brown rice.
Often there's still some left, so I'll then add coconut milk, Thai spices, lemon juice, etc. I'll probably have that with curried wedges.
If, after all that, there is still some left - and I do tend to go overboard with amounts, etc - I'll make my favourite pie...
Thai chilli non carne pie.
…using a soda bread crust - great hot or cold, and travels well (for away days at the cricket!
).
Sorry, OP, didn't mean to hijack your thread - got a bit carried away there!