Zucchini, Rice and Cheese Gratin (Tian de Courgettes au Riz)

for dish

I use, brand, use 1 1/2 of other brands

plain, uncooked

medium, minced

divided

mashed or finely minced

optional

as needed, although water or broth of your choice would work just fine, 1/2 cup needed for streamlined directions, less for original

grated, divided