To make the filling, brown ground beef, onions and peppers; drain. Add the rest of the ingredients down to the cornmeal except the cheese. Bring to a boil; simmer, uncovered, uncovered, for 20 minutes or until thickened. Add 1/2 cup of the cheese; stir until melted. Set aside.
To make the crust, combine cornmeal, salt, water and chili powder in saucepan. Cook on medium-high, stirring constantly, until thick. Add butter; mix well.
Spread half of crust mixture over bottom of a 12x8x2" baking dish. Add filling; spoon on the remaining crust.
Bake at 375 degrees for 45 minutes. Top with 1/2 cup of grated cheese, if desired, put back in oven to melt. Let it set a few minutes before serving.