Grilled Tuna Nicoise

Name: Grilled Tuna Nicoise
Ingredients: 2 cups Chianti; 2 tablespoons white balsamic vinegar; 1 teaspoon granulated sugar; 2 tablespoons grapeseed oil; 6 (6 to 7-ounce) tuna steaks; Salt and freshly ground black pepper; 1/2 cup diced tomatoes; 3 tablespoons capers, drained; 1/4 cup pitted kalamata olives; 1 tablespoon minced garlic; 2 tablespoons thinly sliced fresh basil; 1 tablespoon minced fresh parsley; 1 pound orzo pasta, cooked; 1 cup spinach leaves; 1/2 cup (1 stick) unsalted butter, at room temperature; 1/4 cup cooked and thinly sliced pancetta; 1/4 cup grated Parmesan