1Put the fennel, garlic, onion and dill in the roasting pan. Drizzle with 2 tablespoons of the oil and season with salt and pepper. Toss gently to combine then spread evenly over the base of the pan.
2Insert the wire rack into the middle shelf position. Preheat the oven. Select BAKE/SUPER CONVECTION/350°F/10 minutes and press start.
3Drizzle the remaining oil over the skin of the trout and use your fingertips to rub the oil into the skin. Season both sides with salt and pepper.
4Place the trout on top of the fennel.
5Once preheated, place put the trout in the oven and bake for 10 minutes.
6Remove the trout from the oven. Insert a knife into the thickest part to ensure it is cooked to your liking. Serve with lemon wedges.