...楼上的,帮你修正下.
vegetable确实是可数名词,应加"s".其余没有语法错误,"lots of"既可修饰可数名词,也可修饰不可数名词.
We need lots of vegetables every day.
不过,顺便提下,貌似最常用的搭配是"plenty of vegetables".
希望能帮到楼主啦~