MasterChef favourite Amina Elshafei has been diagnosed with a rare autoimmune disease called myasthenia gravis.

The remaining 18 junior home cooks face their first team challenge of the season and the first-ever MasterChef Junior team relay race. Each team must create a large serving of seven-layer dip.

Fox has renewed 'MasterChef,' starring Gordon Ramsay, for a 15th season. James Beard Award nominee Tiffany Derry joins the show, which premieres in the summer.