1/4 c. olive oil
2 tbsp. lime juice
1 tbsp. dry mustard
2 tbsp. dried cilantro
1 tbsp. chili powder
1 tsp. black pepper
1 tbsp. mustard seeds
4 to 6 tuna steaks

Mix ingredients and brush onto tuna steak. Refrigerate for several hours. Grill for 4 minutes per side or until steaks just begin to flake.