A "lavish feast" refers to a grand and luxurious meal, usually held for a special occasion, wherein a large amount of delicious and elaborate food is provided. Full definition
A legendary gourmet with a penchant for indulging in lavish feasts prepared for himself, his..... (bgtw.org)
The festivals were lavish feasts that celebrated the booming of new flowers, the chirping of birds, butterflies, and sunshine and in general the feeling of rejuvenation that is inherent of spring. (religion.blogs.cnn.com)
She's prepared a lavish feast and sent out formal invitations. (religion-online.org)