Yes, get some meal plan sheets from a dietician.
In the meantime, swap all carbs to wholegrain, but still have smaller quantities. There's whole ranges of Uncle Ben, etc wholegrain pouches which are useful. Half a pouch would be one portion.
Natural yogurt with fruit.
Unsweetened wholegrain cereals with dried fruit, or one slice of wholemeal toast, sunflower spread... You could swap to oat and unsweetened almond milk to reduce fat (I've found that a huge benefit, and have given up cheese too.)
You still need fats, but fish, olives and avocados are better than cakes, chips and bacon. Never eat crisps.
The skins of potatoes are great, so scoop out the mash from baked potatoes and give that to the kids, you eat the skins and less potato. Also, eat the washed, scrubbed skins of root veggies.
Soups, salads, wraps, stews with lots of veggies, roasts with low salt gravy and not too many roasties (swap for skin on boiled baby potatoes and steamed mixed veggies) all good.
Get a 3 tier steamer! Trout and a range of steamed veg with lots of herbs was a staple of mine and really helped.