For extra crunchiness, mix grated Parmigiano with a handful of ground oats before sprinkling over the top (the carb count will be slightly increased).
Metric kitchen scales are an inexpensive yet invaluable gadget to ensure accurate measurement of ingredients. Store them upright in a cupboard or over your worktop and they'll only take up a tiny bit of space. Click
HERE for the ones I use. For U.S. option click
HERE.