El Coyote Enchiladas Suizas

Name: El Coyote Enchiladas Suizas
Ingredients: 2 lb. tomatillos, husks removed, rinsed; 8 cloves garlic, unpeeled; 2 jalapeño peppers, stemmed; 2 large white sweet onions, such as Maui or Vidalia (1 quartered, 1 minced); 1 cup chicken stock, heated; 2 cups roughly chopped cilantro, plus sprigs for garnish; 1 cup sour cream; 2 tbsp. fresh lime juice; 2 tsp. ground cumin; Kosher salt and freshly ground black pepper, to taste; 3 tbsp. canola oil; 3 cups cooked, shredded chicken; 8 (10-inch) flour tortillas; 5 cups shredded Monterey Jack