小菜一碟，汉语成语，拼音是xiǎo cài yì dié，意思是比喻微不足道的很小的一件事情，或随时都可以轻而易举对付的小事情。

WORDS
1. 小 adj.（xiǎo）small
2. 菜 n.（cài）vegetable; food; dish
3. 一 num. （yì）one
4. 碟 n.（dié）plate
HOW TO USE IT?
小菜一碟 literally means “a small dish” or “a small plate of food”. It is a metaphor used to say something is very easy or trivial, which is not worth making a big deal out of. This phrase is usually used to describe how easy it is to get things done. It can be translated as A PIECE OF CAKE.
EXAMPLES
这(zhè)次(cì)考(kǎo)试(shì)是(shì)小(xiǎo)菜(cài)一(yì)碟(dié)，我(wǒ)不(bú)用(yòng)学(xué)那(nà)么(me)多(duō)！
This test was a piece of cake. I didn’t have to study so much!
我(wǒ) 以( yǐ ) 为(wéi) 英(yīng ) 语(yǔ) 考(kǎo) 试(shì) 很(hěn) 难(nán)，但(dàn) 其(qí)实(shí)不(bú)过(guò)就(jiù)是(shì)小(xiǎo)菜(cài)一(yì)碟(dié)。
I expected the English test to be difficult, but in fact it was a piece of cake.
Jane 说(shuō)自(zì)己(jǐ)的(de)新(xīn)工(gōng)作(zuò)简(jiǎn)直(zhí)就(jiù)是(shì)小(xiǎo)菜(cài)一(yì)碟(dié)。