Cut your chicken breast into 3 even cutlets by placing one hand flat on top of the breast and running a sharp knife horizontally through the breast 1/3 of the way down and then again with halfway through the bottom piece of the meat so you have three thin, even pieces.
Place two containers on the counter large enough to fit your chicken breast pieces for dipping. To the first add the milk. In the second, stir together bread crumbs, Italian seasoning, salt, and pepper. Dredge the first breast piece in the milk and then coat in the crumbs. Repeat with the remaining pieces.
Start orzo and cook according to package instructions. Drain and keep covered when finished.
While your orzo cooks, heat your skillet over medium heat and melt butter. Add chicken breasts to the hot pan and cook for 3 to 5 minutes per side until an instant-read thermometer inserted into the center of the breasts reads 165°F.
Transfer chicken breasts to a cutting board and tent with foil to keep warm.