Breakfast - we often have dried or fresh fruit with cereal or porridge. Sometimes a glass of fruit juice. So that's 0-2 portions with breakfast, just depends.
Mid-morning (or break for kids at school) - piece of fruit.
Lunch - always one piece of fruit at least. Often some salad or veggies with lunch, even if it's just a handful of cherry tomatoes.
So that's usually 1-2 portions.
Evening meal - always have 2-3 portions of veg and/or salad. We eat veggie meals 4-6 times a week, so many of our meals are based around veg rather than the veg being an extra. So for example, last week I did a veggie crumble that used 1 kg veg, between the 5 of us, so that's the equivalent of over 12 adult portions of veg (roughly 80g per adult portion, children obviously less in proportion to their age/size/appetite). Home-made soups are a great way of getting some veg in, and you can always throw a few diced carrots in a pasta sauce or similar.
Nine times out of ten, pudding is fruit-based. So fresh fruit, stewed fruit (we grow and freeze lots of fruit!) either on it's own or with yoghurt or ice-cream or custard. Sometimes hot puddings like fruit crumble.
So evening meal would be 3-4 portions.
There might also be some dried fruit during the day - kids especially like a tub of dried fruit, seeds and nuts after school - and anyone who wants supper in the evening is usually directed to the fruit bowl as well as possibly some bread/crackers.
Kids probably average 6-7 portions a day, I manage about 8-9 and my husband about 10-11.
The key is just to take lots of opportunities throughout the day, rather than seeing it as a huge task to achieve at teatime. So a glass of juice with breakfast and a banana and salad sandwich at lunch is potentially 3 portions without having to put much effort in.