Isabella and Jack, both 12 years old, will go spatula-to-spatula for the title of Junior MasterChef Australia.On Sunday, Jack from Tasmania and Isabella from Queensland were announced as the top two contestants for what is sure to be an intense and emotional grand final on November 15.The dishes that secured the two finalists' places were mollusc-tastic, with Jack preparing Snail Porridge -- a recipe concocted by top chef Heston Blumenthal -- while Isabella opted for Mussel Spanikopita, which had the judges raving.The Monday night grand final...