Preheat oven to 400 degrees.
Cut a slice off the top of the tomatoes and scoop out the the seeds.
Mix together ham, mushrooms, bread crumbs, parsley, salt, pepper, cayenne pepper and 1 tablespoon melted butter.
Fill tomatoes with this mixture, heaping it in the center.
Sprinkle a little bread crumbs on top of each one and drizzle with remaining tablespoon of butter.
Bake at 400 degrees for 35 minutes and broil for three more minutes, watching carefully to not burn.