First, turn on the oven to 390F degrees and line a baking tray with baking paper. Pour yellow and red peppers in the oven along with squash and carrots brushed with oil and sprinkled with salt. (If you want a little more grilled vegetables, pour them on a frying pan) Remember to look at it sometimes and turn it around. It must be about 20 min. in the oven, or more.