Sainsbury is a long way away unfortunately.
I think the best way to make lasagne (sez she who hasn't made it for ages) is to use home frozen batch cooked bolognaise sauce with ready made cheese sauce and no-need-to pre-cook lasagne sheets - must look out for that
cheese sauce if/when we get to Sainsbury's.
Otherwise the kitchen can look like a demolition site.
Our Welfare State. Is it broken?