In a bowl, season the meat with the garlic powder, salt, and pepper. Set aside.
Dice the onions, peppers, and garlic. (You can place it in a food processor if you have one)
Heat the oil in a pan over medium-high heat (about 2-3 minutes).
Once the oil is heated, stir in the onions, peppers and garlic to make a sofrito. Cook until the onions start to become transparent (about 5 minutes).
Add the meat and stir it into the sofrito. Let cook for about 5 minutes, until all the meat is brown.
Add the tomatoe sauce, Sazon Goya sin achote, olives (optional), and raisins (optional) to the meat. Bring to a boil. Lower the heat to low afterwards and let it simmer for about five minutes.
If adding the fried potatoe cubes, peel the potatoe and cut into 1/2 inch slices. Cut the slices in half, and then into three pieces, making potatoe cubes about 1/2 inch think. Heat, about an inch of oil, over high heat. Once hot (about 3-5 minutes), add the cubes of potatoes and let cook for about 7 minutes, until they become golden brown. After, transfer to a plate lined with paper towl, and then stir them into the picadillo once it is done cooking.