How can you get nutrients from food that can be taken in with a swollen throat?

My boyfriend has tonsillitis and his throat is almost completely swollen shut, the last doctor we went to didn't do much to help, so while we're waiting to get a second opinion, he's been living off of chicken broth and water... which stil hurt for him to swallow but it's at least possible. He's been on this stuff for 2 weeks now, and I'm afraid his nutrition is suffering.... what kind of foods can i buy him?