Mini Honey-Mustard Meatloaves with Roasted Potatoes

INGREDIENTS

• 2 tablespoons olive oil, plus more for baking sheet
• 2 tablespoons plus 1 teaspoon honey mustard
• 2 tablespoons ketchup
• 1 pound ground beef chuck
• 1 large egg, lightly beaten
• 1/2 cup panko (Japanese breadcrumbs)
• 1 cup shredded white cheddar (about 4 ounces)
• Coarse salt and ground pepper
• 1 pound white new potatoes, scrubbed and quartered
• 1 tablespoon red-wine vinegar
• 1 head Boston lettuce, torn into bite-size pieces