Put chilies, tomatoes, and onion on aluminum foil lined broiler pan and broil, turning often, until lightly charred. (Or cook in a hot skillet over medium-high heat until lightly charred). When cool enough to handle, remove chili stems and tomato skins.
Combine Knorr® Chicken flavor Bouillon Cube and 1 Tbsp. water in small microwave-safe cup and microwave at HIGH 20 seconds or until very hot.
Combine chile mixture, Bouillon mixture, garlic and cilantro in blender and process until smooth.