Carefully remove core from cabbage and discard discoloured outer leaves.
Fill a large size pot about halfway with water and bring to a boil. Place the whole head of cabbage into the water. (it should be submerged)
Boil until it is al dente and the outer leaves can be peeled off without breaking. About 10-15 minuets. Set aside and cool
In a large bowl, combine ground beef, cauliflower rice, parsley, onion powder, salt, garlic powder, and pepper. Use your hands to mix well
Gently peep the outer 8 leaves off the boiled cabbage and reserve for the cabbage rolls. With a sharp knife, shave off any thick veins from the outside of the reserved leaves. Quarter the remaining head of cabbage, cut out the core from each quarter, and place in a dutch oven or 2 quart casserole dish.
Lay cabbage leaf out in front of you so that where it was connected to the core is toward you and is curling up. Place ⅛ of the meat mixture about 2 inches from the edge closest to you and shape the meat int a 3 inch wide log.
Fold the 2 inches closest to you over the top of the meat and roll so that the edge is underneath the meat.
Next, fold the right side of the leaf over the meat, repeat with the left side. Roll meat forward toward farthest edge.
Place the cabbage rolls, seam side down, into the dutch oven along with the cabbage quarters.
Pour the tomatoes and juice over the top, and sprinkle with additional salt and pepper.
Bake: Cover and bake at 350° for 2 hours, or until the rolls are so tender you don't need a knife to cut them.