Preheat oven to 350ºF. Combine sausage, bread crumbs, onion, egg and salt and pepper to taste in large bowl; mix lightly.
Remove tops from tomatoes; save for later. Scoop seeds out of tomatoes, leaving a ¼-inch shell; discard seeds. If necessary, cut thin slice from bottom of each tomato so it can stand upright. Stuff tomatoes with sausage mixture; stand in baking dish. Top with tomato tops.
Bake 60 minutes. Remove tops continue baking 20-30 minutes or until sausage is thoroughly cooked (160°F). Let stand 5 minutes before serving. Serve with egg noodles, if desired.
This recipe was created in partnership with Jimmy Dean brand for the Family Table program.