Butternut Squash Stuffed With Cauliflower

Ingredients:* 2 medium butternut squash* olive oil for drizzling* salt and freshly ground black pepper* pinch of dried oregano* 1 red onion,* 8-10 cherry tomato, halved* 1 cauliflower* handful fresh parsley, finely chopped* 1 lime, (optional)* leafy green salad to serve (optional)