Tuna With Citrus Vinaigrette Over Couscous

• 4 individual
• 4 oranges
• 1 tuna steaks (thick fresh)
• 1 salt and pepper
• 1/8 flakes (dried red)
• 80 ml orange juice
• 60 ml olive oil
• 30 ml lemon juice (fresh)
• 22 ml soy sauce
• 30 ml rice wine vinegar