First, heat a grill pan or an outdoor grill over medium-high heat. While it’s heating, slice your halloumi cheese. Lightly oil the grill grates to prevent the cheese from sticking. Place the halloumi slices on the hot grill and cook for 2-3 minutes per side until you see beautiful golden-brown grill marks and the cheese is slightly softened. Once grilled, remove it from the heat and set it aside.
Now for the fun part. On a large platter or in a big salad bowl, start by arranging the bed of arugula or baby spinach. Add the cubed watermelon, thinly sliced red onion, and the grilled halloumi slices. Gently toss the components together or arrange them artfully on the platter for a more dramatic presentation. The mix of colors and shapes already looks incredible.
In a small bowl, whisk together the olive oil, balsamic glaze, lime juice, and optional honey. Season with a pinch of salt and pepper. Just before you're ready to serve, drizzle this tangy dressing over the salad. To finish, sprinkle the chopped fresh mint and toasted nuts over the top. This final touch adds an extra layer of flavor and texture that completes the dish.