Plot: Discover how smooth caramel and milky chocolate combine with scrumptious pretzels to produce a perfect salty sweet snack; the makers of Jelly Bellys get those mouth-watering flavours into their jellybeans; lip-smacking Korean dumplings are jam-packed with savory spices and healthy veggies; and meaty, finger-licking Cornish pasties get their signature shape from an underground connection.