I've just completed my umpteenth read of VDT - SC, here I come!
Anway, when I came to Ramandu's island with the magical feast laid out on the table, it suddenly struck me that eating and drinking are an important element of all the CoN. Below is a list off the top of my head - I don't claim it is exhaustive!
LWW - Lucy being lured by Mr Tumnus into taking tea with him, Edmund eating magical Turkish delight, all four children eating with the Beavers
PC - two lunches between four when the children first arrive on the island, fish and bear meat with Trumpkin, the feast at Dancing Lawn, the feast produced by Bacchus and the Mynads (sp) after the romp
VDT - the meal delivered by the Dufflepuds before Lucy makes them visible, the meal Coriakin produces after Lucy has made him visible, the magical feast on Ramandu's island, drinking the water of the last sea, the picnic on the beach with Aslan
SC - eating eels with Puddleglum, Puddleglum drinking the giant's brew, eating with Rillian during his enchantment, eating in the cave after they escaped from Underworld
HHB - Aravis' 'rather nice things', the feast Tumnus brings to Shasta in Tashbaan, the food Aravis has in the Hermit's house
MN - Digory and Polly sharing the toffees, Jadis eating the apple, Digory lusting after an apple, Digory feeding an apple to his mother
LB - Jill and Eustace giving Tirian the sandwiches they've brought, the 'porridge' in the tower, the fruit they eat 'inside' the stable
All of this suggests that Lewis thought food and drink important. Narnia seems to be the place to go for a good knees up!