Heat the olive oil on medium-low in a medium stock pot. Sweat the onions and garlic for about 2 to 3 minutes. Add the lal mirch, curry powder, cinnamon and let it sweat for another minute. Add the mangoes, pineapple, sugar, vinegar, salt and stir to combine. Raise the temperature to medium-high and bring to a boil. Once it begins to boil reduce to heat to low and let simmer for about 30 to 40 minutes or until the sauce is to your desired thickness. Remove from the heat and allow to cool. Transfer chutney to blender and blend until smooth. Store additional chutney sauce in the fridge.