, cut into 1 1/2 x 1/4-in. slices
1 540-mL can
, drained and rinsed
, finely shredded (3 cups)
PREHEAT barbecue to medium. Soak 8 wooden skewers in hot water.
PRICK potatoes all over with a fork. Microwave on a plate on high until slightly tender, 4 min. Let cool slightly. Finely chop tops of green onions and cut whites into 1-in. pieces.
CUT potatoes into quarters lengthwise, then cut into 1/2-in. slices. Thread potato, halloumi and white parts of green onions on skewers. Brush with 1 tbsp oil.
OIL grill. Barbecue skewers, lid closed, until grill marks form and potatoes are tender, about 12 min, turning every 3 min. Meanwhile, whisk remaining oil, vinegar, honey, 1 tsp sumac, salt and pepper in a medium bowl. Stir in lentils, radicchio, parsley and green onion tops.