Put uncooked pasta in slow cooker, mix Alfredo sauce through pasta, half fill jar with water & mix through pasts & sauce.
Layer tuna over top of pasta, slice eggs & later over tuna, then pour white sauce over egg layer, sprinkle bread crumbs over white sauce.
Cook on high for 4 hours, with tea towel under lid. The last half an hour of cooking put a few dollops of marg/butter randomly over bread crumbs, place tea towel & lid back on.