One meal a day seems bad, but I can't remember why. Maybe you should split it up into 3 meals.
Somebody resting uses at least 2000 calories a day (2000calories is roughly 200g of fat), so you'll be losing about 1400g a week, or 3lb (min). Seems a little extreme.
Chicken is pretty healthy, but I would suggest you eat at least 1500 calories, and keep up lots of excersice. Simply eating less won't "tone" you, excersise is far more important.
I know plently of guys who eat huge amounts of "bad" foods, but are toned as they excersise to burn it off.
In a big cycle, say 8h, I'd burn 5k calories. If I ate what you're eating, I'd "bonk" after a couple of hours. I eat masses. It's not uncommon for me to eat 12 choc-spread sandwiches on a 2h ride. The bonus of excersice, as well as feeling good, is you can eat masses and stay thin.