Samkeh Mechwiyeh and Tarator Sauce with Pine-Nut Kernels

This recipe will do honour to a fine mérou (grouper) weighing (uncleaned) about 2 kg (4½ lb). The fish should be cleaned, rubbed with salt and lemon juice, left in the refrigerator for a while, then rinsed and dried. It can be stuffed with a sliced tomato and a