Mango Chicken Curry

Name: Mango Chicken Curry
Ingredients: 3 Tbsp (or more) of vegetable oil; 1 large onion, chopped (1 1/2 to 2 cups); 1/2 red bell pepper, chopped; 2 garlic cloves, minced; 2 Tbsp fresh minced ginger; 2 Tbsp yellow curry powder; 1/2 teaspoon ground cumin; 2 mangos, peeled and diced; 2 Tbsp cider vinegar or white vinegar; 1 1/4 cup water; 1 1/4 pounds skinless boneless chicken thighs or breasts, cut into 1-inch pieces; 1/3 cup golden raisins; 1/2 cup heavy cream (can substitute all or partially with coconut milk); Salt and pepper; Cilantro for garnish