Sea food salad

Name: Sea food salad
Cuisine: Portuguese, European
Ingredients: 350 g/12 oz cleaned squid (calamari) or cuttlefish, cut into bite-size pieces; 350 g/12 oz raw prawns (shrimp) with heads and shells; 1 spring onion (scallion), chopped; 3 tablespoons extra-virgin olive oil; I tablespoon fresh lemon juice; I clove of garlic, minced; 1 tablespoon finely chopped flat-leaf parsley; 1 tablespoon finely chopped coriander; salt and pepper black olives, to garnish; 1 or 2 Hard-boiled Eggs; I teaspoon ground cumin