Heat up olive oil in a non-stick pot and lightly saute chopped garlic, big onion cubes and black pepper for a few minutes.
Add in the potato cubes and carrot cubes and stir them together for another 5 minutes.
Add in the tomato puree, oyster sauce and italian herbs and lastly add in the chicken pieces and cheery tomatoes and stir till well combined.
Add in enough water and simmer under low heat till the potatoes and carrots have soften and the chicken pieces are tender and soft . This may takes 1 hour.
Keep stirring at 15 minutes interval to avoid the bottom from burnt . Add salt and sugar to taste and add in thickening last.
Off heat and serve hot with pita bread, pasta or hot steaming rice.