Not sure about lasange, but casseroles are easy and can be either cooked and left in the fridge for up to three days to reheat as you like
put any vegies, I use chopped up ( in cubes) potato carrot pumpkin zucchini anything really and add a can of tomato soup and then a can of water, pepper to taste... and cook for an hour or so until its all soft and mushy.... you can add meat chunks or bacon or chicken or whatever meat, lamb is yummy

Its ds's favourite atm and DH's always, his mums receipe