Do your kids like fruit and raw vegies? Obviously healthy, and quick and easy to prepare. My kids love dipping carrot, cucumber and celery sticks in to hommus, salsa or guacamole. I try to feed them a lot of raw or steamed vegies. My kids eat lots of raw salad vegies whenever we have tacos. They also like corn or rice cakes topped with peanut butter and sliced banana. We also snack on cashews and dates.

It sounds like you know what you need to do re: cooking from scratch and cutting the white bread. Everyone will adapt. Good luck!

ETA re: salt and sugar levels. When buying packaged products aim for less than 10g of sugar per 100g. With salt, aim for 120mg of salt or less per 100g- you will find that most packaged products are way over this salt level. Also, avoid trans fats and aim for very low levels of saturated fats (or preferably none at all).