Preheat the oven to 375 degrees F.
Place cauliflower and broccoli
into a 9 by 13 inch baking dish
, toss with the olive oil, and sprinkle with salt. Cover the dish and bake for 1/2 hour. Remove the cover, stir and cook for 30 to 40 minutes more, until vegetables are tender and nicely browned, stirring occasionally.