Grilled Chicken Melt with Sun-Dried Tomato Spread and Pesto

boneless (skinless chicken thighs, trimmed of excess fat)

salt and pepper

ciabatta rolls (halved as for sandwiches)

extra virgin olive oil

Sun-Dried Tomato Spread

pesto. Homemade or store bought

slices fresh mozzarella (about 6 ounces total)