It's totally a preference if you want to stuff squash with or without meat. I like it with lamb,ground round or loose Italian sausage.
You can leave the meat out for a totally vegetarian dish. Just use the zucchini that was hollowed out and rice in the stuffing.
When I was growing up my mom would make this often. We loved it. We had relatives that grew kusa on their farm and would be able to use that hybred version of squash. Here in Florida they call it Mexican squash.
It's light green in color. The taste is quite the same but so tender and seems to have less seeds in my opinion.
Baking these is such an easy way to prepare this meal. I love using throw away pans also. I love making something with no clean up!
The best thing about this recipe is leftover heat up easily and they taste great!