Green Chile Catfish

1 or 2 catfish filets
1 or 2 tablespoons olive oil
1 or 2 tablespoons butter
3 or 4 garlic cloves, finely diced
1 medium white or yellow onion, cut in half,
    thinly sliced
2 or 3 poblano or Anaheim green chiles, cut in half,
    de-seeded, and sliced thin
1 or 2 jalape