1. Preheat oven to 200C. Toss pumpkin in half the oil and roast on a lined baking tray for 15 minutes, or until tender and golden.
2. Heat remaining oil in a 28cm non-stick frying pan, add onion and cook for 2-3 minutes or until tender.
3. Add roasted pumpkin, tuna, peas and oregana to the pan. Pour in eggs and stir gently to distribute the vegetables evenly. Sprinkle with feta and top with tomatoes, cut side up. Season with salt and pepper and cook over low heat for 10-15 minutes, or until just set.
4. Place under a preheated grill for 5 minutes or until the top is golden brown. Cut into wedges and garnish with fresh herbs.