In a shallow bowl, whisk together milk and egg. In a separate shallow bowl, whisk together flour, seasoning salt, and pepper.

Place each piece of steak in the flour mixture, turning to coat and shaking off the excess. Place the steak in the milk mixture, then dredge it through in the flour mixture, coating well. Place on a wire rack and repeat until all steak is coated. Allow to rest and make the gravy.

When ready to cook, heat cooking oil in a large skillet set over medium heat. Fry the steak in batches for 2 minutes on each side, flipping once, until golden brown. Remove to a paper towel-lined plate to drain while cooling. When the steak is finished cooking, reserve ¼ cup of the cooking oil.

Serve with warm gravy.

In a large saucepan set over medium heat, add the butter (or reserved cooking oil.) Whisk in flour and cook for 2-3 minutes, adding more if needed, until golden. Slowly whisk in milk, then season with salt and pepper, to taste.

Cook, whisking frequently, for 6-8 minutes until gravy is thickened and smooth. Taste and season as needed, then serve with steak.