Adjust rack to top position and preheat broiler to high or oven to 500 degrees. Wash and dry all produce. Halve, core, and deseed poblano; thinly slice crosswise. Trim and thinly slice scallions, separating whites from greens.

In a small bowl, combine sour cream and hot sauce to taste. Stir in water 1 tsp at a time until mixture reaches a drizzling consistency. Season with salt and pepper.

Heat a drizzle of oil in a large, preferably ovenproof, pan over mediumhigh heat. Add poblano and season with salt and pepper. Cook, stirring, until poblano is softened and lightly blistered, 5-7 minutes.

Meanwhile, place chicken in a medium bowl and pat dry with paper towels. Toss with a drizzle of oil, Southwest Spice, salt, and pepper. Add chicken and scallion whites to pan with poblano. Cook, stirring, until chicken is browned and cooked through, 4-6 minutes. Stir in a quarter of the salsa; taste and season with salt and pepper. Turn off heat; transfer to a separate medium bowl. Wipe out pan.

Divide chicken mixture between tortillas. Roll up tortillas and place seam sides down in pan used to cook filling. (TIP: For 4 servings or if pan isn’t ovenproof, place enchiladas in a 9-by- 13-inch baking dish). Top with remaining salsa and sprinkle with cheese.

Broil or bake enchiladas on top rack until browned and bubbly, 3-4 minutes. (TIP: Watch carefully to avoid burning.) Remove from oven. Drizzle with crema and sprinkle with scallion greens. Serve.