Sarah Sanders says John Kelly was mad about breakfast pastries -- not Trump saying Germany is 'controlled by Russia'
Sarah Huckabee Sanders addressed the tense situation at this morning's NATO breakfast meeting/Screenshot

Donald Trump and some of his closest aides are in Brussels today to meet with America's NATO allies.

The day began on a sour note as Donald Trump ranted about Germany being "controlled by Russia" over breakfast.

Chief of Staff John Kelly appeared quite perturbed as his boss ranted, looking as though he was considering getting up and walking out.

But the actual issue was simply the quality of the food, White House spokesperson Sarah Huckabee Sanders has now told the Washington Post.

"[Kelly] was displeased because he was expecting a full breakfast and there were only pastries and cheese," she said.

The Post asked NATO for a comment—presumably on the pastries and cheese—but the spokesperson was not immediately available.