Prawn Cake

Name: Prawn Cake
Ingredients: 1 tablespoon butter, for greasing; 3 tablespoons vegetable oil; 1 medium onion, sliced; 3 cloves garlic, peeled and left whole; 1 teaspoon freshly grated ginger; 5 whole black peppercorns; 4 whole cloves; 1 teaspoon cumin seeds; 1 (1/2-inch) piece cinnamon stick; 2 mild dried red chiles; Kosher salt; 2 tomatoes, chopped; 1 teaspoon sugar; 2 teaspoon white wine vinegar; 10 1/2 ounces raw prawns (medium shrimp), heads and shells removed, de-veined; 3 1/2 ounces sugar; 4 1/2 ounces butter; 3 free-range eggs, beaten, plus 1 free-range egg yolk, beaten; 1/2 teaspoon salt; 3 ounces semolina, soaked in 4 ounces water for 15 minutes; 8 1/2 ounces all-purpose flour; 1 teaspoon baking powder; 6 ounces milk; 3 1/2 ounces desiccated coconut (unsweetened finely shredded coconut); Lightly dressed green salad, to serve