Pot Roast made easy!

1.5 to 2 lb chuck roast, 4 large potatoes, 4 to 6 large chopped carrots, 1/2 onion, 1/2 green or red pepper, 2 stalks of celery (optional), beef stock, 1 small can of tomato paste, 2 packets of sazon, 3 tblspn of Goya Recaito, 1/2 tsp of sugar.