INGREDIENTS
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1 tablespoon olive oil
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4 (6-ounce) skinless, boneless chicken breast halves
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1/2 teaspoon kosher salt, divided
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1/2 teaspoon black pepper
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1/2 teaspoon ground ancho chile powder
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Cooking spray
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2 small ripe avocados, halved and pitted
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1/4 teaspoon sugar
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2 medium red onions, peeled and cut into 1/4-inch-thick rings
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4 green onions, trimmed
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1 poblano pepper, sliced
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3 tablespoons fresh lime juice
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1 tablespoon lower-sodium soy sauce
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1/3 cup reduced-fat sour cream
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2 to 3 tablespoons water
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8 cilantro sprigs
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4 lime wedges
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1 teaspoon aleppo or other coarse red pepper (optional)