Peel the husk layers and the silk from the corn. On an open flame, grill the corn, rotating all over. You’ll hear popping sounds as the corn gets charred all over.
Cool the grilled corn for around 5 minutes. Over a bowl, run a sharp knife shear to shuck the grilled corn kernels off the cob.
Cut the onion into quarters and peel off the slices to get bite sized pieces. Deseed the yellow bell pepper and chop in bite sized pieces. Toss in 1 tsp olive oil and either roast on a cast iron skillet or in a preheated air fryer / oven at 190°C for 7-8 minutes until the edges of the onion and bell pepper turn golden brown.
Peel the cucumber. Using the peeler, process the cucumber into long strips, discarding the seed core. Roll up each strip and keep aside.
Deseed and chop the red bell pepper into 1 cm squares.
To assemble the salad, take a platter and scatter a layer of corn kernels. Place the cucumber rolls on the bed of corn. Scatter the grilled onion and yellow bell pepper, and red bell pepper pieces.
Top with chimmichuri sauce and serve immediately.