Sweet and sour Tuna - Ravida

Ingredients

• 4 slices of tuna
• 2 medium sized onions, thickly sliced
• 1 tbs capers in brine, washed in water and milk
• 1/4 cup red wine vinegar
• 1/2 tbs sugar, depending on the vinegar
• Extra virgin olive oil
• Sea salt
• 10-12 Mint leaves