Preheat the oven to 200 ° C (top / bottom heat, convection: 180 ° C). Chop the capers, mix with the herbs, mustard, almonds and breadcrumbs.
Add enough olive oil to form a compact mass, then season with salt and pepper.
Rinse the fish fillets, dab them off, season with salt, pepper and place in a greased casserole dish. Spread the herb mixture over the fish fillets and cook in the oven for approx. 15-20 minutes.
Meanwhile, cut the tomatoes into pieces, peel and chop the onion and garlic. Sweat in 2 tablespoons of oil. Add the tomatoes and simmer for about 2 minutes. Season with honey, balsamic vinegar and salt and serve with the fish.