Salsa Simmered Fish on Quinoa

• 1 brown onion, finely chopped
• 2 cloves garlic, crushed
• 1 tsp cumin
• 2 tsp paprika
• 1 carrot, finely diced
• 2 sticks celery, finely diced
• 400 g tin tomatoes
• 1 tbsp red wine vinegar
• 250 g firm white fish
• 250 g quinoa and brown rice mix, cooked