Not enough emphasis can be placed on the "easy" part of this recipe. I got this from my new Chapel Hill 1st Ward Cookbook. It was submitted by my friend Christine Blackburn. My kids even ate this willingly.
4 boneless, skinless chicken breast halves
1/2 c. pesto with basil (in the deli fridge at the supermarket)
2 to 3 plum tomatoes, sliced (I used Roma tomatoes because they were on sale, but I think plum tomatoes would be prettier.)
1/2 c. shredded Mozzarella cheese
Preheat oven to 400 degrees. Line baking sheet with foil. Place chicken and pesto in medium bowl. Toss to coat. Place chicken on baking sheet. Bake for 20 to 25 minutes or until chicken is no longer pink in the center. Remove from oven. Top with tomatoes and cheese. Bake for an additional 3 to 5 minutes or until cheese is melted.