Pomegranate Salmon - Kosher Kingdom

Ingredients

• 1 (3 ½ lb) side salmon, no skin, no bones, trimmed
• 1 lg red onion, sliced very thin
• ¼ cup olive oil
• 1 cup pomegranate juice
• ¼ cup unfiltered apple cider vinegar
• 2 Tbsp tomato paste
• Salt and pepper to taste
• 1 tsp turmeric
• 1 cup pomegranate seeds (optional)