A table was laid with a lot of delightful food and a beautiful cake was in the centre of it.

delightful 是由名词 delight（快乐、喜悦）加上形容词后缀 -ful 构成的形容词，意思是"令人愉快的、讨人喜欢的"。 在这里 delightful food 指的是"令人愉悦的食物"，可以理解为"美味的食物"。