Cut the pineapple, zucchini, red onion and bell pepper into pieces that you can easily thread on a skewer.
BBQ Mixed Vegetable Balls Skewers
Thread alternately 3 pieces of each vegetable, pineapple and mixed vegetable balls onto each skewer. Keep them covered in plastic wrap in the refrigerator
Peel the garlic. Cut the chili in half and remove half of the seeds (if you like it spicy, leave it all). Place the garlic, chili and ginger in a food processor or in a tall blender jar, for a stick blender and grind until fine.
Bring the water, sugar, vinegar and a little salt to the boil in a saucepan and add ground chili pepper mixture. Mix the starch with some water and add it to the hot mixture while stirring. Bring to a boil, stirring gently until the mixture thickens, and let cool. If desired, add extra fresh ginger and/or rice vinegar. Pour the sauce into a bottle and store in the refrigerator.
Coat the grid with some oil. Grill the skewers on the BBQ, serve with the salsa and garnish with extra coriander