Tonight I made a stuffed Mediterranean squash dish, but you could use a fat zucchini just as well:
~ cut off the stalk end and a tiny bit off the blossom end of a fat summer squash and cut squash in half lengthwise
~ cut around the outer edges of the squash leaving a 1/4" to 1/2" shell; score the middle section and scoop it out and dice
~ fry up about 1/4 lb. bulk sausage (either breakfast or Italian) along with some diced onion, bell pepper, garlic, and the diced squash; saute until cooked completely, season with salt and pepper, some torn basil leaves, and some dry bread crumbs; cool slightly and add some grated Parmesan cheese
~ take the squash shells and steam for about 10 minutes in a steamer basket over boiling water with a lid on; test shells with a knife to be sure they are very tender
~ put shells in a greased baking pan, fill with the sausage mixture and bake at 375 F for about 30-40 minutes - until the stuffing is browned and everything is hot through.
note: this turned out delicious, but next time I may not steam the squash shells but just bake them with the filling in them; the skin of this squash is very tender and steaming made the squash boats just a little too soft.