Lovely idea found somewhere on Pinterest: I've tried them, they're simply and delicious.
I prefer them room temperature rather than hot or warm, not tried cold.
I used a mini muffins pan (so hard to find it in Italy...Two friends of mine ordered it and gave to me as Christmas present and I still say thank you!), I don't think they would turn out well in a regoular muffin pan: too big, there's the risk they remain soggy inside.
This week end in my city there's a big flower fair: if you like flowers and gardens give a look to my facebook page, I've posted a lot of pics!
For 12 mini muffins:
1 medium zucchini grated
1/2 onion grated or finely diced
salt & pepper
1/2 smashed garlic clove
1/4 cup grated Parmesan or Pecorino cheese
1/4 cup bread crumbs
Mix all the ingredients in a bowl, if it's seem too liquid add a little more bread crumbs, put the mixture with a spoon into the muffin holes (grease them if you don't have a non sticky pan).
Bake for 20-25 minutes at 400 F°, serve room temperature.