I've already done a bolognaise, please excuse the photo, it's not great, I keep meaning to take another one.
http://mamacook.blogspot.com/2011/07/bolognaise-adults-and-babies.htmlIf you don't have a slow cooker, just simmer in a pan, the slower the better IMO. There's no extra sugar in the recipe and if you use an ultra low salt stock cube it's very low salt.
To make into a lasagne, layer up with white sauce (made with just milk and cornflour to keep salt down), easy (no precook) lasagne sheets, start with white sauce, then bolognaise sauce, lasagne sheet, repeat until you reach the top of your dish. Finish with white sauce and loads of grated vintage / extra mature cheddar and bake for approx 40 mins at 180 - 200oC. If you keep the salt down everywhere else the cheese content should be fine.
For under 1's I'd definitely err on the side of caution on any kind of pate. After 1, I eased up a lot. I'm still thinking through the pate though. I'm determined to make it work!