Cut the watermelon into bite-sized cubes and dice the shallot. If using nuts, toast them in a skillet over medium heat for a few minutes until fragrant. Once cool enough to handle, give the nuts a rough chop and set aside.
In a large nonreactive mixing bowl, or in a small mason jar, add 2-3 tablespoons of diced shallot, 3 tablespoons extra-virgin olive oil, 1 ½ tablespoons fresh lime juice, 1 teaspoon honey, 1 teaspoon salt, and ½ teaspoon ground black pepper and shake or mix vigorously.
Add the arugula, 3 cups cubed watermelon, and dressing into a large, nonreactive mixing bowl and stir to combine and coat the lettuce. Sprinkle the ¼ cup shaved parmesan and ½ cup toasted walnuts on top and serve immediately.
1) Cheese – Many recipes favor feta with watermelon, so use that if you prefer. I like shaved parmesan better, so use what you like. If you have a chunk of parmesan, use a vegetable peeler to slice off shavings. Do not use the non-refrigerated grated parmesan for this.2) Watermelon – Feel free to buy pre-cut watermelon for his recipe. If you want to save money though, look for whole, seedless watermelons on sale during most of the summer. I got an entire watermelon for $2.50 and only needed barely a quarter of it here. The same store sold sliced watermelon in a package big enough for this recipe for $9.99.