Heat oil in a large saucepan over medium-high heat.
Brown the cubed meat, crushed garlic, and ginger powder in the hot oil.
Add curry paste and turmeric powder to the saucepan. Mix well to coat the meat.
Stir in coconut milk, water, sliced onion, bell pepper, cubed potato, and sliced carrots.
Allow the mixture to come to a slow boil.
Maintain a slow boil until potatoes and carrots are cooked through, approximately 10-15 minutes.
Stir in fish sauce and sugar. Add crushed red pepper flakes for extra heat if desired.
Serve immediately over jasmine rice.