Chicken Sate would be fun for a luau party. You could even poke the skewers into a pineapple for a serving idea.
Here's a recipe I found for the sate.
Chicken Sate
2 pounds boneless skinless chicken breasts
Marinade:
1/4 cup soy sauce
1/4 cup fresh lemon juice
2 tablespoons vegetable oil
1 tablespoon sugar
Dipping Sauce:
2 cloves garlic -- chopped
4 green onions (white part only) -- chopped
2 tablespoons fresh lime juice
1 tablespoon brown sugar
1/2 teaspoon curry powder
1/2 teaspoon crushed red pepper
3/4 cup peanut butter
3/4 cup coconut cream or milk -- (unsweetened)
Pound the chicken breasts between sheets of plastic wrap until thin and even. Cut into strips about 3/4 inch wide and several inches long. In a medium sized bowl, combine marinade ingredients. Add chicken strips to marinade and allow to marinate at room temperature, tossing occasionally, for 30 minutes. You can marinate longer in the refrigerator, but remove from refrigerator 30 minutes before grilling.
Meanwhile, in a food processor or blender, combine garlic, green onions, lime juice, brown sugar, curry powder, and hot pepper flakes. Process until garlic and onions are finely chopped. Add peanut butter and coconut milk. Process until smooth.
Thread chicken on 10 or 12-inch wooden skewers which have been thoroughly soaked in advance. Grill over direct medium-high heat for approximately 10 minutes, turning occasionally and basting with the peanut sauce. Cook until just tender and opaque. The chicken will barely turn color so doneness should be determined by the firmness of the meat. Be careful to not overcook or the meat will be dry.
Serve chicken with remaining peanut sauce for dipping.
Yield: 8 servings
I also found this site with Luau recipes. They sound interesting - I've never tried any of them, but I thought you might like the link.
http://www.1800partysolutions.com/luaurecipes.htm
Hope this helps.