Chicken-&-Brie Sandwich w/ Roasted Cherry Tomatoes

This gourmet lunch made for a special treat.  It took about 45 minutes from prep to plate and it seemed like a lot of work for lunch and the ingredients can get a little pricey if you don't already have them stocked.  
Modifications: If you are short on time you could shave off 20 minutes by picking up a rotisserie chicken from your local store. (What I should have done!)
Make a vegetarian version by leaving off the chicken and adding some extra cheese and tomatoes.

If your a brie lover like me then you won't mind spending a few extra dollars and a little extra time to make this yummy sandwich for a special lunch. Remember! There's no need to cut the rind off the Brie, it's edible.

Ingredients

• 1 teaspoon olive oil 
• 2 cups halved cherry tomatoes (about 1 pound) 
• 2 tablespoons balsamic vinegar 
• 1 tablespoon chopped fresh thyme
• 1/4 teaspoon kosher salt
• 1/8 teaspoon black pepper 
• 1/4 cup low-fat mayonnaise 
• 1 tablespoon whole-grain Dijon mustard
• 1 garlic clove, minced 
• 1 (16-ounce) loaf French bread, cut in half horizontally
• 3 ounces Brie cheese, sliced 
• 3 cups shredded cooked chicken breast (about 1 pound) 
• 2 teaspoons extra-virgin olive oil 
• 1 teaspoon balsamic vinegar 
• 1/8 teaspoon kosher salt
• 2 cups fresh spinach 

Preparation

• Preheat oven to 300°.
• Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat. Add tomatoes; cook 4 minutes, stirring once. Remove from heat; stir in 2 tablespoons vinegar. Sprinkle tomatoes with thyme, 1/4 teaspoon salt, and pepper. Wrap handle of pan with foil; bake at 300° for 15 minutes. Keep warm.
• Combine mayonnaise, mustard, and garlic in a small bowl. Spread mayonnaise mixture evenly over top half of bread loaf. Spoon tomatoes evenly over bottom half of loaf. Arrange Brie over tomatoes; top with chicken. Combine 2 teaspoons oil, 1 teaspoon vinegar, and 1/8 teaspoon salt in a medium bowl, stirring with a whisk. Add spinach, tossing gently to coat. Top chicken with spinach mixture; replace top half of bread. Cut loaf into 6 pieces.