3 cup all-purpose flour 1 tablespoon baking powder 1 tablespoon sugar 1 teaspoon salt ¾ teaspoon cream of tartar ¼ teaspoon cayenne pepper ⅓ cup butter 1 cup shredded cheddar cheese 1 cup milk ½ cup mashed cooked sweet potato 4 slices bacon 1 1/4-inch thick fully cooked ham slice (about 5 oz.), cut into 4 equal pieces 1 cup strong coffee ¼ cup peach preserves 4 eggs, scrambled Fresh flat-leaf Italian parsley leaves