Giardiniera with Ham and White Beans

Name: Giardiniera with Ham and White Beans
Ingredients: 3/4 cup white wine vinegar; 1/3 cup sugar; Kosher salt; 6 scallions, white and tender green parts only, cut into 1-inch lengths; 4 cups mixed green, yellow and white baby cauliflower, cut into 1-inch florets (12 ounces); 4 ounces sugar snap peas; One 15-ounce can white beans, drained and rinsed; 4 ounces thickly sliced ham, shredded; 1/2 cup flat-leaf parsley leaves; 2 tablespoons salted roasted sunflower seeds; 1/4 cup extra-virgin olive oil; Freshly ground pepper