It’s a tale as old as time, or at least as old as TikTok: chicken nuggets lovingly topped with a dab of caviar. McDonald’s is embracing the trend this Valentine’s Day with a limited-time McNugget Caviar kit. The free kit, which will be available on McNuggetCaviar.com on Feb. 10, pairs a one-ounce tin of Paramount’s Siberian sturgeon caviar with a $25 McDonald’s gift card to buy McNuggets. McDonald’s is even throwing in some crème fraiche and a caviar spoon. Valentine’s Day is big business for U.