Rinse the tuna steaks and pat dry with paper towels. In the refrigerator, marinate the tuna steaks in the orange juice for at least 3 hours, but overnight is better.
In a small bowl, combine celery salt, onion salt, white pepper, flour, and salt. Remove the tuna steaks from the orange juice; dust with flour mixture.
Using a heavy bottomed saute pan or a cast-iron pan, warm the olive oil. Increase the heat to high and place the tuna in the pan. Sear for 1 minute, then turn over carefully, reducing the heat to medium. Sear the other side for 1 more minute until medium rare. (Do not overcook the tuna or the meat will become dryand lose its flavor.) Remove tuna steaks from pan and keep warm.
Reduce heat to medium-low. Add soy sauce, Madiera, cream and horseradish; stir until heated thoroughly. Remove from heat and pour sauce over tuna steaks.
Makes 4 servings.
Seared Madeira Tuna Recipe: https://whatscookingamerica.net/tunaMaderia.htm