Prepare the Ingredients: Begin by peeling and deveining the shrimp, slicing the bell pepper, dicing the onion, and mincing the garlic and ginger. Set these aside.
Sauté the Aromatics: Heat oil in a large skillet or wok over medium heat. Add the onion, garlic, and ginger, sautéing until fragrant and translucent.
Add Spices: Stir in the curry powder, cumin, coriander, and turmeric, cooking until the spices are well combined and aromatic.
Incorporate Bell Pepper: Add the sliced bell pepper to the skillet, sautéing until slightly softened.
Pour in Coconut Milk: Gently pour the coconut milk into the skillet, stirring to combine all the ingredients evenly.
Season the Curry: Add the fish sauce and brown sugar, adjusting the seasoning to taste. Simmer the mixture until it thickens slightly.
Cook the Shrimp: Add the shrimp to the curry, cooking just until they turn pink and are cooked through.
Final Touches: Squeeze in the lime juice and stir the curry. Remove from heat and garnish with fresh cilantro.