Add quinoa to a large bowl. Set aside.
Rub corn with 1 tablespoon oil and a pinch both of salt and pepper. Grill, turning frequently, until corn is charred and heated through, 10-12 minutes. Remove from grill to cool. When cool enough to handle cut kernels from cobs and transfer to bowl with quinoa.
Cut your grilled halloumi cheese into chunks, toss into bowl.
Add blueberries and lightly stir.
Whisk together orange juice, rice wine vinegar and extra virgin olive oil. Season with salt and pepper. Pour over quinoa mixture and lightly toss.
Sprinkle on the fresh mint and serve.