Prep ingredients. Snap off ends of beans and cut into thirds. Chop one large onion. Peal and cut baby potatoes in half. Clean and devein prawns. (I usually cheat and buy prawns already cleaned).
In a heated pot add olive or preferred cooking oil. Add onions and brown. Add garlic and salt and stir. Cover for 2-3 minutes. Keep flame on medium.
Add dry spice mix and stir well. Add 2 tablespoon lukewarm water. When oil separates from spices, add in prawn. Stir and cook for 5 minutes.
Add in beans and potatoes. Stir well. Add another 2 tablespoons of lukewarm water. Cover and lower the flame. Cook for 15 minutes, stirring occasionally.
Turn off the flame once vegetables are fork tender. Uncover and garnish with cilantro and green chillis to taste.