Season doves with salt and pepper. Cover and refrigerate for 30 minutes. Meanwhile, heat olive oil in a medium sauce pan over medium-high heat. Add garlic and onion and sauté for 2 to 3 minutes. Add brown sugar and cook until sugar melts and turns to liquid. Add remaining ingredients except butter. Reduce contents by boiling, uncovered, until there is approximately 1 1/2 cups of liquid. Remove pan from heat and whisk in butter, one piece at a time until sauce is thickened.

Baste doves briefly with sauce and cook to medium-rare. I prefer the barbecue method which takes approximately 5 to 7 minutes while turning occasionally over a medium-hot bed of coals. When cooked, spoon sauce over doves and serve with warm rice. If you need to reheat the sauce, do so over very low heat while stirring. Do not boil or the sauce will separate.