1.
Heat canola oil in deep fryer to 350 degrees F.
2.
Season chicken with salt and pepper, then dredge in 3 tablespoons flour. Place in oil and fry for 10 minutes on each side. Remove and drain on paper towels, then add to gravy. Stir to coat.
3.
In a skillet over medium heat, melt 3 tablespoons butter. Whisk in a heaping 3 tablespoons of flour and cook, stirring, for 2 minutes. then gradually stir in the beef stock. Cook until thickened, about 3 minutes, then stir in celery and season to taste with celery salt.
4.
Add chicken to gravy. Bring to a boil, then simmer on low for 10 minutes. Gravy should be very thick.
5.
Add remaining butter and evaporated milk to the gravy and serve with rice, if desired.