In a bowl, mix egg, milk, ketchup, onion and seasoning well. Add rice and mix through. Add burger and mix through. Don't overmix or it will be tough. Divide equally into 8 portions...should be about 1 c. each. Take a paring knife and cut a V notch into the bottom of each cabbage leaf where the thick stem is. Put a scoop of the meat mixture on the leaf, in the middle but a little towards the bottom. Fold bottom of leaf up over the meat, then fold both sides over, then roll up. Place in baking dish with folds on the bottom of the pan. Repeat until all meat and leaves are done. Chop remaining head of cabbage and scatter over the top of the cabbage rolls. Salt and pepper. In a bowl, mix pepper puree with 1 cup of the V8. Evenly distribute this over the top of the cabbage. Finish with the remaining 1/2 can of V8. Cover with tin foil and bake at 350* for 2 hours, or High in a crockpot for 4 hours, or low for 6. I always serve with mashed potatoes, green beans and a salad.