1. Melt 3 tablelspoons butter in a large saucepan. Add leeks, green garlic and spring onions. Saute 10 minutes on low, don’t let brown. Add salt and pepper. Sprinkle leek mixture with 3 tablespoons flour and stir until blended. Cook 2 minutes. Add chicken stock and whisk well. Cook 10 minutes or until thickened. Add milk and cook on low 10 minutes until thickened. Add cheeses and cook 5 minutes. Add spinach and cook 10 minutes. Serve with croutons and smoked chicken, if desired.