DON Quixote fills a well up with rice and puts some meat in the center for a giant beef-bowl.
丼 is made of well (井)+ a dot, which we'll call a little piece of beef (speaking of which - why your step-dad got a M16 collection??)
beef-bowl ★★★☆☆ SUF
SUFFIX meaning ‘bowl of hot rice and sweet sauce with a painfully stingy amount of XXXX on top' (XXX is usually beef or pork)
beef bowl (beef over rice).