Preheat your oven to broil at 500°F and position the oven rack on the top setting.
Place prepared jalapenos, poblano, tomatillos, tomatoes, garlic, and lime on a baking sheet. Drizzle with vegetable oil and sprinkle with garlic powder, salt, black pepper, and dried oregano.
Roast in the preheated oven for 10-12 minutes or until the vegetables begin to char.
Remove from the oven and transfer all ingredients, including the squeezed lime juice, to a blender or food processor. Add cilantro.
Blend until smooth, approximately 20 seconds.
Taste and adjust seasoning with salt and pepper as needed.