Place your diced or sliced yellow squash in a pot with the onions, green onions, garlic and just cover them with water. Bring to a boil and turn down a bit and cook til the yellow squach is nearly done and has softened.
Carefully pour the water off reserving a bit (probably about 1/2 a cup) of the water.
Add butter and spices.
Mix in the cornbread, spices, soup mix, with the squash/veggie mixture, and pour into a glass casserole dish, or similar oven proof vessel.
Place in oven for 45 mins uncovered. It's just that easy.
Warning, do not use a sweet cornbread with this recipe.