The downtown bakery in Tomales opened its doors last weekend as Route One Bakery and Kitchen, under the new ownership of Shannon Gregory. Mr. Gregory, who owns the Marshall Store, moved to Tomales three years ago and hopes to breathe new life into the bakery—and the town. The business will be open 7 a.m. to 1 p.m. Thursdays through Sundays, and will newly offer pizza and bread.   David Briggs