Combine seasonings & brown sugar in a small bowl.
Rub seasoning over fish and pan fry or bake in the oven as directed below.
Heat oil and butter in a cast iron skillet over medium high heat.
Add the seasoned fish and a few of the lemon slices and cook 3 minutes per side or just until done (do not overcook).
Serve with remaining lemon.
Turn broiler onto high and place oven rack on the top.
Line a pan with foil and add tilapia fillets and a few lemon slices. Broil for 3 minutes.
Flip fish and additional 3-4 minutes until tender and flaky. Do not overcook. Serve with remaining lemon.
(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)