INGREDIENTS
1
yellow onion, chopped
1
yellow bell pepper, chopped
6
piquillo peppers, chopped
2 tbsp
brined capers, drained
4
(5- to 6-ounce) skin-on halibut fillets
2 tbsp
extra-virgin olive oil
1/4 tsp
fine sea salt
1 tbsp
balsamic or white cava vinegar
1/4 tsp
ground black pepper