Brush the cooking grills clean with a wire brush. Grill the whole spring onions over direct high heat, with the lid closed, until the outer layers are blackened and charred, approximately 5 minutes, turning once. While the spring onions are cooking, place the lemon halves, cut side down onto the cooking grill and grill over direct high heat for 2 minutes or until caramelised.
Brush the cooking grills clean with a wire brush. Grill the whole spring onions over direct high heat, with the lid closed, until the outer layers are blackened and charred, approximately 5 minutes, turning once. While the spring onions are cooking, place the lemon halves, cut side down onto the cooking grill and grill over direct high heat for 2 minutes or until caramelised.
Brush the cooking grills clean with a wire brush. Grill the whole spring onions over direct high heat, with the lid closed, until the outer layers are blackened and charred, approximately 5 minutes, turning once. While the spring onions are cooking, place the lemon halves, cut side down onto the cooking grill and grill over direct high heat for 2 minutes or until caramelised.
Once your barbecue has preheated, brush the cooking grills clean with a wire brush. If you are using a Weber Pulse: leave the control knob(s) on high (290°C+). Grill the whole spring onions over direct high heat, with the lid closed, until the outer layers are blackened and charred, approximately 5 minutes, turning once. While the spring onions are cooking, place the lemon halves, cut side down onto the cooking grill and grill over direct high heat for 2 minutes or until caramelised.
Once your barbecue has preheated to the set temperature (SmokeFire: 290°C+), brush the cooking grills clean with a wire brush. Grill the whole spring onions over direct high heat, with the lid closed, until the outer layers are blackened and charred, approximately 5 minutes, turning once. While the spring onions are cooking, place the lemon halves, cut side down onto the cooking grill and grill over direct high heat for 2 minutes or until caramelised.