To prepare a vegetable rolls chilli mayonnaise recipe, you will first need to prepare the ingredients for the recipe. You will need the following ingredients: 12 cup (60 ml) olive oil 2 tablespoons chopped fresh chillies 1 teaspoon kosher salt 2 tbsp. ground cumin 1 tablespoon ground coriander 2 teaspoons ground nutmeg 1/8 teaspoon ground black pepper Instructions: Heat the oil over medium-high heat. Add the onion and cook until softened, about 5 minutes. Stir in the garlic and pepper. Cook, stirring occasionally, until the onions are clear and the peppers are lightly browned, 2 to 3 minutes more. Remove the pan from the heat and add the vinegar. Simmer, whisking constantly, for 1 to 2 minutes, or until reduced by half. Taste the mixture and adjust the seasonings, if necessary. Serve immediately.