Genesis 42:9

And Joseph remembered the dreams he had dreamed of them. And he said to them, You are spies: to see the nakedness of the shame of the land are you come.

AND JOSEPH REMEMBERED THE DREAMS WHICH HE DREAMED OF THEM. [That is, he remembered the dreams which he dreamed] concerning them, and now knew that they had been fulfilled, for they had bowed down to him. This is the language of Rashi.
In my opinion, the matter is the reverse. Scripture states that when Joseph saw his brothers bowing down to him, he remembered all the dreams which he had dreamed concerning them and he knew that in this instance, not one of the dreams had been fulfilled. He knew that it was inherent in their interpretation that according to the first dream, at first all his brothers would bow down to him, as it says, And, behold, we were binding sheaves, for “we” refers to all eleven of his brothers. The second time, in accordance with the second dream, the sun, the moon and eleven stars, Verse 9. would bow down to him. Now since he did not see Benjamin with them, he conceived of the strategy of devising a charge against them so that they would also bring his brother Benjamin to him, in order to first fulfill the first dream. It is for this reason that he did not wish to tell them at this time, I am Joseph your brother, and to say, Hasten and go up to my father,, 45:9. and send wagons, as he did to them the second time,, Verse 19. for in that case his father would undoubtedly have come at once. It was only after fulfillment of the first dream that he told them, I am Joseph your brother, etc., in order to fulfill the second dream. Were it not for this consideration, Joseph would indeed be regarded as having committed a great sin: bringing anguish to his father, leaving him for many days in the position of being bereft and mourning for Simeon and him. Even if it was his intention to cause his brothers minor anguish, how did he not have compassion for his elderly father? But he assigned each to its proper time in order to fulfill the dreams, knowing that they would truly be fulfilled. Also, the second matter, which he effected against them in connection with the goblet, is not to be interpreted as if his intention was to cause them anguish, but rather because he suspected that they might hate Benjamin as a result of their jealousy of him on account of his father’s love for him, just as they were jealous of Joseph. Perhaps Benjamin had sensed that they had harmed Joseph, thus causing a quarrel and hatred to erupt between him and his brothers. Therefore, Joseph did not wish Benjamin to …

ערות, places where the walls were breached, areas from which it would be relatively easy to invade the country. The word ערוה is used in this sense in Chabakuk 3,13 ערות יסוד, “revealing its very foundations.” Another verse in which the word ערוה appears in a similar sense as here is Psalms 137,7 ערו ערו עד היסוד, as well as Isaiah 19,7 ערות על היאור”whatever is by the side of the Nile will be blown away, will vanish.” The fact that all the brothers were of exceptional build, always went everywhere together, made them distinctly different from other travelers so that Joseph pointed to that fact as being suspicious and accused them of being spies.

ויזכור יוסף את החלמות אשר חלם להם. He remembered the part his brothers had played in his dreams, how they had bowed down to him in the dream showing the sheaves of corn. (37,7) He remembered that only his own sheaf had remained erect, and not fallen after first having arisen. This is why he wanted that they would all come when he would recognise them and the part in the dream speaking of the upright sheaf remaining upright would be fulfilled also. This detail of the dream was due to Joseph symbolising the redeemer of the Jewish people in the future as portrayed by the words ירה ויור, “shoot!, and he shot”. in Kings II 13,17. [this was an opportunity, though missed because of the king of Israel not complying completely with the prophet Elisha’s instructions, of reuniting the kingdoms of Yehudah and the Kingdom of Israel. i.e. that of Ephrayim, the descendant of Joseph. Ed.] There were several such opportunities foreseen by the prophets compare Hoseah 2,2 and Daniel 2,44. The author does not really elaborate. Ed.]

לראות את ערות הארץ באתם, to find out if we have enough food supply for our own country. You did not really come here to buy. It is certainly not the custom of other buyers to arrive in groups of

אשר חלם להם, for the dreams had really concerned the brothers, primarily. He realised now that they had hated him on account of his dreams; this is why when he remembered all that they had done to him instead of repaying them in kind, he only made them extremely uncomfortable for a while. [perhaps what the author means is that originally, Joseph had thought that the brothers resented his becoming a big shot in his dreams, whereas only now did he realise that what they really resented was the fact that they, the brothers, appeared as socially low ranking, slave like, in Joseph’s dreams. Ed.]