Make-Ahead Ham and Caprese Picnic Sandwich Recipe | Valerie Bertinelli | Food Network

Ingredients

• 1/4 cup extra-virgin olive oil
• 2 tablespoons red wine vinegar
• Kosher salt and freshly ground black pepper
• 1 large beefsteak tomato, cut into 6 slices
• One 10- by 5-inch loaf of ciabatta
• 3/4 pound prosciutto cotto (Italian cooked ham)
• 8 ounces fresh mozzarella, drained and sliced
• 1 cup basil chiffonade