weatherall
Since you haven't started your new thread yet 
Make a list of whatever saucy dishes you eat.
Pizza, pasta, shepherds pie, lasagne, etc.
When you make your sauce, start every base with a decent amount of finely chopped / or even blended onion and celery. This plus chopped tomatoes is already a good portion of veg.
With a pizza sauce, take this base and add in chopped mushroom, garlic, aubergine, courgette, and anything else you fancy. Let it simmer for 40 mins or so, and blend it all up so it's lovely and thick. Play with veg types and quantities till you get a taste and consistency you like. This on your pizza should go unnoticed and is again a good quantity of veg. Also try adding in chopped veg as a pizza topping - peppers especially are lovely and sweet.
You can use the above as a pasta sauce base, adding an extra carton of chopped tomatoes and some water. Then you can add cooked mince and stock, or bacon, etc etc - what ever you like to make a really lovely sauce. Use for lasagne too.
When making something like shepherds pie, again start with the onion and celery, but add in chopped or grated carrot. When you have cooked it all through with mince etc, just before topping with potato, stir through petit pois.
These are all really easy, innoffensive ways of adding veg into your meals without having to have a big pile on your plate to plow through.