regal, regale

Regal or regal ( ree guhl ) describes something belonging to, connected to, or worthy of, a king or queen; royal--
He showed his assent with a regal nod of his head.
His clothing was shabby, but his bearing was regal.

Regale or regale ( reh gal ) means to entertain ( someone ) lavishly, with the choicest or finest of everything--
He plans to regale them with caviar and champagne before he explains the deal.
Regale may be used figuratively, often sarcastically, meaning to tell an entertaining story--
He's not going to regale our guests with the story of his trip again, is he?

Now that you know that, you can say--
"They are planning to regale the board of directors with a truly regal banquet."

Note --"regale" ( reh gal ee ) means the emblem or insignia of a king or royalty--
The king's regale bears a lion rampant.
The plural of "regale", meaning an emblem or insignia, is "regalia"--
The professors attended, wearing their academic regalia.
Note # 2--"regal" also means a portable reed organ from the 1500's or 1600's--
The museum has an old regal that still plays.