Put the spaghetti in a pan and cook according to can. Once cooked put on simmer while you prep the rest

Cook the bacon to your liking and chop it up, dice the onion and slice the cheese

Toast the bread and butter if you wish then place one slice on top of the other and then press down in the centre to make a well

Fill the well of the toast with spaghetti making sure it doesn't overflow

Then add the chopped bacon on top

Then add the diced onion to the top

Then layer the cheese over the top to cover

Place under the grill to melt the cheese. Once the cheese is bubbling remove and plate the dish and enjoy :-)