Preheat oven to 375 degrees.
Place pecans and bread in food processor and chop finely.
In three separate shallow bowls place mixed flour and garlic powder, beaten eggs, and chopped pecan mixture.
Season breasts with salt and pepper. Place breasts in flour to coat, then dredge in egg wash and place in pecan mixture to coat. Put the breasts in the oven for ten minutes, flip them, and bake another ten minutes.
Check internal temperature. It should be 145° F or greater.
Remove from oven and cover with foil for 5 minutes to rest. Serve warm with honey mustard sauce.