Add the olive oil to a Dutch oven or a large, deep skillet over medium heat.
2 tablespoons extra virgin olive oil
Stir the curry powder into the oil and cook, stirring, for 1-2 minutes, until fragrant.
2 tablespoons curry powder
Next, add the peppers and onion and cook, stirring often for 3-4 minutes, or until the vegetables start to softened. Stir in the garlic and cook for about 1 minute longer.
2 bell peppers, 1 onion, 2 cloves garlic
Season the chicken with salt and pepper and add to the curry mixture, tossing to coat. Reduce heat to medium and cook until the chicken is lightly browned on all sides.
1 1/2 pounds boneless, skinless chicken, salt, pepper
Add the coconut milk, tomato sauce and sugar.
1 13.66 ounce can coconut milk, 1 8 ounce can can tomato sauce, 1 tablespoon sugar
Cover and simmer, stirring occasionally, for about 30-35 minutes, or until the chicken is cooked through and the vegetables are tender. The longer you cook it, the more the flavors will develop.
Serve this curry over rice or noodles, or with naan, if desired.