Unhappy with today’s Chicken Parmigiana.

The sauce was fine, the cheese was perfect, my wife’s chicken was OK, I take one bite of my chicken and it’s practically rubber.  I mean, seriously, I was at first unsure if it had cooked at all.  It was the bigger piece, and I suspect that I should have had it in the oven at 350 degrees for forty minutes, not fifty — but the other chicken breast was fine.

I dunno what happened, in other words. Thoughts?  Because the cheese was perfect.