When the meat mixture is cool enough to handle, place in a large bowl. Add the tomato paste, dill, rice, paprika, dried mint and season generously with black pepper and sea salt. Mix well to combine and divide the mixture into 8 portions. Form each portion into a sausage shape and wrap inside a blanched cabbage leaf. Place seam side down in a large pot. Repeat for remaining portions. Pour the canned tomatoes over the cabbage rolls and then cover the rolls with boiling water. Place a lid on the pot, bring the cabbage rolls to a boil and then simmer gently for 1 hour.