Preheat the oven to 425F on convection (if you don’t have convection, then preheat to 450F). Line two baking sheets with parchment paper.
Divide the vegetables evenly between the two baking sheets, making sure the pans don’t get too crowded. Drizzle with the olive oil and sprinkle with salt. Use clean hands to toss everything to coat.
Bake for 20 minutes or until the vegetables are charred. Remove from oven and let cool a bit.
Arrange the torn greens on a large platter, squeeze with ½ lemon and ½ orange and sprinkle with salt. Top with the roasted vegetables. Squeeze the remaining ½ orange and ½ lemon all over the vegetables. Sprinkle everything with more salt and some pepper. Finish with a generous drizzle of good olive oil.
Top with herbs, cheese (if using) and nuts (if using).