Tuna Tomato and Bean Salad

Name: Tuna, Tomato and Bean Salad
Ingredients: 1 small, red Chile pepper; 1 Garlic clove; juice of a Limes; 2 teaspoons freshly grated Ginger root; 5 tablespoons dark Soy sauce; 2 tablespoons Fish sauce; 1 tablespoon Sesame oil; 1 teaspoon Cornstarch; 4 Tuna steaks (about 200 grams); Salt; 600 grams Tomatoes; 200 grams black Beans (canned); 1 Scallion; freshly ground Pepper; 3 tablespoons White vinegar; 3 tablespoons Olive oil; Parsley (for garnish)