Chicken and Mushroom Chimichangas

Preheat the oven to 400 degrees F (200 degrees C). Line a heavy baking sheet with parchment paper or a silicone baking mat.

Heat 1 1/2 teaspoons vegetable oil in a heavy skillet over medium-high heat. Add onion, poblano peppers, and mushrooms; season with salt and black pepper. Cook until soft, about 5 minutes; continue cooking until vegetables begin to brown, 5 to 10 minutes more.

Move vegetables to edges of the skillet, leaving a space in the center. Drizzle 1 1/2 teaspoons vegetable oil into center. Add chicken pieces to the center; season with cumin, ground chipotle, Mexican oregano, salt, and black pepper. Cook and stir until chicken pieces are browned, about 5 minutes.