01 -
Turn your oven on to 175°C (350°F) so it's good and hot when you need it.
02 -
Throw your thawed potatoes, both soups, chopped onion, and half the cheese into a big bowl. Mix it all till smooth and even.
03 -
Spray a 23 x 33 cm pan with nonstick spray, making sure the corners are covered so nothing gets glued on.
04 -
Plop the potato mix into your pan and spread it out flat so it fills every edge.
05 -
Sprinkle on whatever cheese you have left and drop little chunks of margarine all over so it melts in.
06 -
Slide it into the oven and let it cook for 45 to 60 minutes. You want the top gold and a little crispy and the sides bubbling.