Green & White Chicken Chili Ingredients 1 tablespoon olive oil 1 medium onion, diced (about 1 1/2 cups) 2 stalks celery, diced (about 1/2 cup) 3 medium poblano peppers (about 4 ounces each), seeded and white ribs removed, finely diced (about 1 1/2 cups) 1 clove garlic, minced 1 teaspoon ground cumin 1/2 teaspoon