Cut the tops off of the tomatoes and use a knife to cut around the inside, separating the flesh from the skin. Scoop out the flesh and place the pulp in a strainer. Separate as many of the seeds from the meat as possible and discard. Chop the remaining meat and working as much of the juice out as possible.
In small mixing bowl add all the ingredients except for the topping Panko crumbs, mix well. Spoon the mixture into the tomato skins and top with the remaining crumbs.
Bake in preheated oven for 15 minutes or till tops brown. Be careful overcooking will cause the tomatoes to split. Allow to cool for a few minutes to set before serving.