Depends on the veg
- tarragon goes lovely with mushrooms
- nutmeg with spinach
- cumin with cauliflower
- mint with peas
- basil and tomatoes
- cinnamon and carrots
- aubergine and oregano
- onion and sage
- chilli with peppers ... and most stuff for me
You don't have to buy one of every spice: buy a couple and experiment.
Or check out a few websites like
http://www.spicesinc.com/p-509-the-best-fruit-and-vegetable-seasonings.aspx
Or trying mixing some together to enhance the flavour.
- green beans and carrots can be cooked in the same pan
- onions can be fried with mushrooms, peppers, aubergine, ...
- peas and sweetcorn was a favourite from my childhood
- cook some vegs with a tin of tomatoes
Try some raw instead of cooked
- mushrooms
- courgettes
- peppers
- carrots (sliced or grated)
.