Pre heat oven to 400 degrees.

Beat egg well.

In pan #1- combine the beaten egg and whisk in the dijon mustard. Set aside.

In pan #2- combine the panko, parmesan, and spices.

Meanwhile, place the butter into the oven proof dish and place in the 400 degree oven to 3-4 minutes or until butter is melted.

Carefully remove the hot dish from oven and set on a trivet or a heatproof pad. Place the two pans of egg and mustard mixture and panko next to the hot dish for assembly.

Dip the chicken into the egg mixture. Then dredge in the panko mixture and gently place the coated chicken into the hot butter. Repeat until all the chicken is coated. If you have any leftover panko mixture- sprinkle it on top of the chicken breasts for even more coating.

Use an oven mitt to place the hot baking dish back into the oven.

Bake the chicken at 400 degrees for 10-15 minutes. Then reduce heat to 350 and bake another 20-30 minutes or until the chicken is golden brown and the top is crispy.

Serve immediately.