Place Sauce Part 1 ingredients in a jar and shake well. Place 2 tsp Sauce into a large bowl that you will be making the Meatballs in. Then add the cornflour into the Sauce jar and shake. Set Sauce aside. Add remaining Meatballs ingredients into the bowl. Mix until just combined. Measure out a heaped tablespoon of mixture and dollop onto a work surface. Then roll into balls (see Note 2 if mixture is too loose / sticky to form into balls). Heat oil in a skillet over medium high heat. Add meatballs and cook, browning as best you can all over, or at least on both sides. Once browned all over (about 4 minutes), carefully transfer onto a plate. They will still be a bit raw inside. Return skillet to the stove, still on medium high. Add onion and garlic, cook for 1 minute. Add capsicum and cook for 1 minute. Add Sauce and water and quickly mix - it will simmer quickly. Transfer meatballs (and juices on the plate) into the Sauce. Turn heat down to medium and simmer, stirring occasionally, for 3 - 4 minutes, or until the Sauce reduces and thickens (by which time the meatballs will be cooked). Stir through cashews, serve over rice!