Cribbed from Marcela.
3 tablespoons vegetable oil, divided
1/2 medium white onion, chopped
2-3 poblano chiles, stemmed, seeded and chopped
1 clove garlic, peeled and roughly chopped
1 cup chicken or vegetable broth, plus more if needed
1 cup long grain rice
Heat 2 tablespoons oil in a medium, heavy nonstick skillet over medium heat.
Add the onions and saute until translucent, about 3 minutes.
Add the poblano chiles and saute, about 8 minutes.