Vitamin B2, also known as riboflavin, plays a central role in growth and development. However, it also serves its purpose as a colorant in the food industry. Under UV light, it glows faintly. The vitamin is very light-sensitive, which is why foods rich in vitamin B2 should be stored protected from light. Place all ingredients in a vacuum bag and vacuum seal. Let it sit overnight. Then place in the combi steamer and cook: steam mode 85°C, 1 hr. 20 min., 50% fan speed. Arrange prepared pears on the glass plate, which is illuminated from below with black light, and serve. TIP: Soak the pear stalk in rum and light it – this creates a great effect!