Crunchy, cool, salty and light, poke (pronounced POH-keh), a raw fish salad that originates from Hawaii, makes for the perfect summer meal. The fish (our recipe calls for tuna but you can easily substitute salmon or firm tofu) is typically marinated in sesame oil and soy sauce with green onions; topped with a variety of add-ons like avocado, sesame seeds, or mango; and can be served over rice. Throw a poke party and let everyone experiment with different toppings and sauce combinations — everything can...