1. Saute the onions and garlic with some oil in a large saute pan.
2. Add in the ground beef and saute it for a minute.
3. Stir in the potatoes, carrots bell peppers, Mega Prime Green Peas and Mega Prime Pieces and Stems Mushrooms.
4. Keep sauteing for a few minutes then pour in the tomato sauce and season with fish sauce, salt and pepper.
5. Simmer it for a minute then serve it immediately with steamed rice or bread.