While those cook, bring milk and water to a gentle boil in a sauce pan. Whisk in cornmeal (if you are awesome and can keep it from forming lumps, congratulations. If not, run it through the blender or food processor, or stick your immersion blender in so it's all smooth and lovely). Reduce heat to medium low and cook, stirring occasionally, until it starts to thicken, about ten minutes. Add corn kernels and let cook another two or three minutes. Stir in butter and goat cheese, and season with salt and pepper to taste. Top with roasted tomatoes.