Add 1/3 of the meringue from Step 4 to the bowl from Step 6, and mix well with an egg beater. Return it to the bowl from Step 4, switch to a spatula, scoop it up from the bottom and fold it onto itself, quickly and gently mixing it. It will not expand if you over mix it, but if there are white lumps remaining from the meringue, then a cavity will form, and it will cave in.