Heat the oil in a medium, heavy-based saucepan over low-medium heat. Add the garlic, and saute until golden. Add the chilli powder. Increase the heat to medium. Add the tomato and cook for 2 minutes, until just softened. Add the vegetables and toss to combine. Decrease the heat to low and cook for 6-8 minutes, until tender and flavors have developed. Season with salt and pepper. Keep it warm.