1. Preheat panini grill.
2. Cut bread pieces in half horizontally. Brush uncut sides of halves evenly with oil. Layer bottom halves of bread evenly with tomato slices, cheese, and basil leaves. Sprinkle with pepper, salt, and, if desired, vinegar. Cover with top halves.
3. Place sandwiches on panini grill; cook 2 minutes or until golden brown and cheese melts. Cut sandwiches in half, if desired.
Kids Can Help: Another way to involve kids in cooking is to take them shopping with you. When it's tomato season, most farmers' markets have an amazing selection. Let your kids smell and touch the tomatoes before asking them to choose their favorites. Chances are greater that they'll eat them when they've been a part of the process!