She nodded thinking about what he said.   Looking at the plate, she smiled.  "Like you need fuel to let your brain work.  Have another bite, Sir, maybe something will come to you as you eat."  She suggested.  Thinking a bit, she thought of the time she put out a candle when making a mixture for her stomach. 

"I accidentally put out a candle when I had it near a glass where I was making a mixture of bicarbonate of soda and water.  It fuzzed up as was expected but the candle went out."  She paused to look at him with a light shrug.  "The electric had gone out and it was at night.  I had an upset stomach."  She explained the situation.  "I couldn't figure out why the candle went out, but could it have been the mixture I had made?"  She asked thinking about his foam.