Arroz con Gandules (Pigeon Peas)

This is a typical Puerto Rican rice dish that can be made in different ways, here is my version:
Ingredients:
1 cup medium grain rice
1 cup water or stock
1 can gandules (pigeon peas) rinsed and drained
1/2 cup pork belly, chopped
1/2 cup cooking ham, chopped
1 tbsp olive oil
2 tbsp sofrito
1/2 cup tomato sauce
1 packet sazon culantro y achiote
1/2 cup Spanish olives with pimientos, sliced
1/2 tsp cumin
1/2 tsp oregano (I used powder)
salt and pepper to taste