I have always thrown a bit of tequila and an extra squeeze of lime juice in my fresh salsa to tame the heat for my friends. It adds a nice unique kick to the flavor. Just don't over do it.
Another idea is using milder chili's along with your hotter ones.
@debeadgirl:I think they mean the wild rice blends that are available, like Lundbergs. They have a mix of several types of wild and long grain rices (no spice or flavor packets).
@pipistrello: 2 suggestions... 1) Cook your squash longer without the filling before filling it (filling should be just heated thru, not "cooked" again) and/or 2) place a small loose "tent" of foil on top of the squash after filling so it doesn't brown or burn.
I'm making this, this weekend and will probably add some garlic too! Great suggestion! Thanks Nic!