Step 1Preheat oven to 180ºC. Line a large baking tray with baking paper. Boil or steam cauliflower for 5 minutes, or until tender. Add broccoli for last 2 minutes of cooking time.
Step 2Transfer the broccoli and cauliflower to a greased baking dish. Then mix the parmesan, breadcrumbs and 2 teaspoons of the olive oil together in a small bowl. Sprinkle this breadcrumb mixture evenly over the vegetables. Bake for 10–15 minutes, or until golden.
Step 3Meanwhile, heat remaining oil in a large non-stick frying pan over a high heat. Add chicken and cook for 1–2 minutes each side, or until golden. Transfer to prepared baking tray and spread mustard over top of chicken breasts. Bake for 8 minutes, or until chicken is cooked through. Slice to serve.
Step 4Meanwhile, microwave, boil or steam the pumpkin for 7–8 minutes, or until tender. Drain and mash. Serve chicken on pumpkin mash with spinach leaves and broccoli gratin.