Snapper with capers

2 lbs red snapper fillets or 2 lbs tilapia fillets or 2 lbs mahi mahi fillets (7 fillets) 1 medium onion , chopped 2 cloves garlic , minced 1 cup canned diced[...]

3 tablespoons olive oil 3 garlic cloves , finely chopped 1 large poblano pepper, seeded and chopped (green peppers can be substitued) 1 medium onion , finely[...]