Here is a good one - you just have to buy the curry paste which is available in most grocery stores these days and tastes just as good as the fresh stuff, but much more convenient.
1 cup chicken, cut into bite sized pieces
1/2 cup coconut milk
1 tablespoon chopped garlic
2 to 3 tablespoons Penang curry paste
2 tablespoons fish sauce
sugar to taste
3 kaffir lime leaves, shredded
10-15 Thai basil leaves, finely shredded
Place a wok over medium high heat, and warm the coconut milk, but don't let it boil. Add the curry paste, and stir it until the oil begins to separate out and form a thin film, to bring out the maximum flavor. Add the remaining ingredients except the lime leaves and basil leaves, and simmer until the sauce is absorbed and thickened. Add the lime leaves and basil leaves and stir fry briefly before serving.
Garnish with julienned red chili, with Thai jasmine rice, and the usual Thai table condiments.
Note if you particularly like your curries hot, then replace the fish sauce in the cooking with nam pla prik (chillies marinated in fish sauce), that has had at least a week to mature.