Preheat oven to 375°F. Generously grease a 9x5-inch loaf pan. In a bowl, combine flour, oats, sugar, 4 tablespoons Parmesan, baking powder, and salt. Whisk to blend thoroughly. In another bowl, beat together eggs, milk, and butter. Stir in tomatoes, basil, and oregano. Combine with dry ingredients. Pour into prepared pan and sprinkle with remaining 2 tablespoons Parmesan. Bake for 50 minutes to 1 hour or until a toothpick inserted into the center comes out clean. Cool on a rack for 10 minutes, then turn out. Serve warm. Makes 1 loaf.