Saute shallots in half the butter until translucent add the rice and mix in with butter and shallots. Add the wine and cook over medium heat until it is absorbed stirring continuously, repeat the process with the 5 cups lobster stock adding 2 1/2 cups at a time. Remove from heat and add crab and mint and the remaining butter. Season with salt and pepper and let cool. Place 2 tablespoons in the center of each cabbage leaf and roll. Place stuffed cabbage in a hotel pan and cover with the remaining 16 ounces of stock and tomatoes. Cook in preheated 350 degree oven for 20 minutes. Place on serving tray and garnish with mint.