I have just wasted 3 egg whites, following delia's meringue recipe to the letter, only to make light brown blobs of meringue shell with a huge mallow dough ball in the middle. A complete disaster. Nothing like the delicious M&S ones I would normally buy.
She said to heat the oven to 150, put them in and reduce the heat to 140, leave for an hour, turn oven off and leave to cool completely. What am I doing wrong?