They separately served Joseph, his brothers, and the Egyptians. They ate separately because the Egyptians would not eat with the Hebrews, since that was detestable to them.
KJV
And they set on for him by himself, and for them by themselves, and for the Egyptians, which did eat with him, by themselves: because the Egyptians might not eat bread with the Hebrews; for that [is] an abomination unto the Egyptians.
ASV
And they set on for him by himself, and for them by themselves, and for the Egyptians, that did eat with him, by themselves: because the Egyptians might not eat bread with the Hebrews; for that is an abomination unto the Egyptians.