From Casa Madrona Restaurant in Sausalito, Calif. Simmer tomatillos in stock until tender. Saute cilantro and chopped green onion tops briefly in 1 Tablespoon. safflower oil. Mix all ingredients in blender and puree until smooth. Strain and season to taste with lime, salt and pepper. Serve with chicken or seafood. Serves 4. Nutritional analysis per serving: 78.9 calories; 3.6 grams total fat; (0.4 grams saturated fat); 0.9 grams protein; 10 grams carbohydrates; 0.1 milligrams cholesterol; 132.5 milligrams sodium.