Preheat oven to 350. Butter a 9x13 inch baking dish. Set aside.
In a large, deep skillet, sauté the squash, onion and peppers until the onions are translucent and the squash is softened. Sprinkle with the seasoning and flour. Sauté 1-2 minutes until the vegetables are coated. Add the milk and bring to a boil.
Reduce heat and simmer until the mixture thickens, about 5 minutes.
Crumble the cornbread over the mixture and stir to evenly distribute all ingredients.
If the mixture looks very dry, add some more milk. Add additional seasoning as desired.
Pour into the prepare pan and bake for 20 minutes or until golden brown.