Place 2 tablespoons of butter and 1 tablespoon of olive oil in a frying pan over medium heat until the butter melts. Add the minced garlic and fry it until it turns golden.
Next add the rice and stir in the oil and garlic for about 3 minutes until coated with the flavor.
Now, add the warm water and salt and bring to a boil. Half-cover the pan and simmer the rice until the water has mostly evaporated.
Turn the heat down to low and cover the pan. Continue cooking until the rice has finished absorbing the liquid and has softened.
Take off the heat, transfer to a serving platter and leave aside to cool.
In another pan, add the remaining butter and oil and fry the chopped onion together with the raisins, the cashews and Brazil nuts for about 3 minutes, stirring well.
Add the sautéed raisins and nuts over the rice. You can optionally decorate with carambola and more raw nuts, if you wish.