01 - Preheat your grill to medium-high heat. Lightly oil the grates to prevent sticking.
02 - Cut the watermelon into rounds or wedges approximately 1-inch thick. Pat each slice dry with paper towels to remove excess moisture.
03 - Place watermelon slices on the preheated grill. Cook for 2-3 minutes per side until distinctive grill marks appear while the fruit remains firm. Transfer to a cutting board and allow to cool slightly, then cut into cubes or triangles.
04 - In a small mixing bowl, whisk together the extra virgin olive oil, balsamic glaze, Dijon mustard, honey (if using), salt, and freshly ground black pepper until emulsified and smooth.
05 - In a large salad bowl, combine the arugula or baby greens, grilled watermelon pieces, halved cherry tomatoes, and thinly sliced red onion.
06 - Drizzle the balsamic dressing evenly over the salad. Using salad tongs, gently toss the mixture to coat all ingredients without damaging the delicate greens.
07 - Top the salad with crumbled feta cheese, fresh chopped mint leaves, and toasted pumpkin seeds or pine nuts if desired. Serve immediately while the watermelon is still slightly warm.