Take a large pot or casserole and place on medium heat. Let it heat up for a minute, pour half the oil and a minute later add the onions and scallions. Sauté them until a bit translucent, for about 4’.
Add the tomato paste and cook for 1’. Then add the peas, potatoes and carrots along with the bay leaved, thyme and all-spice and season with the salt and pepper. Pour water to almost the level, give it a good stir increase the heat and bring it to a boil.
Place the lid and simmer for 22’. Uncover, add the parsley along with the remaining oil and cook for about 10’ and until all water has been evaporated.