Crunchy Cauliflower Steak Sandwich

CRUNCHY CAULIFLOWER STEAK SANDWICHES 1 large head purple or white cauliflower (2-3 lbs.) ¼ c. flour 1 egg, lightly beaten 2 T. milk 1 c. panko bread crumbs Salt, black pepper 2 T. canola oil 6 slices whole wheat artisan…