One you've heard a lot of times. Otherwise, you just have to try different ones and see what you like. I like Mozart (Marriage of Figaro, Magic Flute). The music is pretty and it's a little more laid-back than some of the dramatic Italian operas (Turandot), German ones (Wagner), and it doesn't sound like a party (Carmen).
Tosca is one of my favorites, and Fidelio too. You can always find arias or clips on Youtube to get an idea if you might like something.
You might try lieder (classical songs) too. They tend to be more soothing. It's usually just a singer and a piano, no big orchestra. I like Schubert, something like Die Schöne Müllerin (the Fair Maid of the Mill), or Brahms.
I'd call it sauteed chicken. You could also call it pan-fried or pan-seared. Or pan-roasted, which can involve putting it in the oven. Fried chicken is this stuff, the kind that has breading and is deep fried.
Or how I usually say it when I'm talking to a friend: I just threw it in a pan and browned it on both sides.
Your picture looks good, makes me want tabouli.