「凄い量」は
a lot of ...
a ton of ...
を使って表現できます。
例:
That's a lot of food! Can you eat all that? I think you're eating too much!
「凄い量の食べ物だよ!それ全部食べれるの?食べ過ぎだよ!」
That's a ton of food! Can you finish it all? I think you're eating too much!
「凄い量の食べ物だよ!それ全部たべれるの?食べ過ぎだよ!」
ご参考まで!