Watermelon Salad with French Feta Cheese and Wild Arugula and Lavender Honey

Name: Watermelon Salad with French Feta Cheese and Wild Arugula and Lavender Honey
Ingredients: 1 tablespoon unsalted butter; 1 tablespoon lavender buds; 1/4 cup mild honey; 1 ounce red wine vinegar; 1 tablespoon minced shallot; 3 ounces extra virgin olive oil; Salt; Freshly ground black pepper; 8 cups red and yellow (optional) watermelon cut into 1 1/2-inch cubes and drained; 1/4 cup finely shaved red onion; 1 bunch mature arugula washed and dried (mint is nice also); 1 cup crumbled French-style feta cheese