Rub the chicken with salt, pepper and oregano and one teaspoon olive oil and set aside for 30 minutes
In the blender, purée the garlic, onions, peppercorns, chili peppers culantro and sweet peppers, with the remaining olive oil
In a large caldero sauté the sofrito purée for 5 minutes over medium-low heat
Brown the chicken pieces to seal in their flavor
Add the tomato sauce and the chicken stock or water to the chicken and bring to a boil
Cover, reduce heat and simmer for 10-15 minutes
Rinse the rice under cool running water until it runs clear
Drain the rice and stir into the soup pot
Raise the heat and bring to a boil once more
Reduce heat to medium and cook uncovered for 20 minutes, stirring occasionally
Add the peas and cook for an additional 5-10 minutes or until the asopao is as liquid or dry as you prefer
Heat the sliced pimentos and the asparagus in their juices
Drain and use to garnish each plate of asopao