Here's a link to a Reuters story that links to the Justice Department memo that confirms the president's legal authority to do last week's recess appointments of Rich Cordray to head the CFPB and three others to sit on the NLRB.
And here's a HuffPO article that finds it ironic that Rep. Diane Black (R-TN) criticized the president from afar, where she has been participating in the non-recess recess: "No matter how you look at this, it doesn't pass the smell test. I hope the House considers my resolution as soon as we return to Washington so we can send a message to President Obama."
By the way, they aren't returning to Washington yet. Another few weeks of non-recess recess is still happening.