Grilled Cheese Sandwiches with Sun-Dried Tomato Pesto

Name: Grilled Cheese Sandwiches with Sun-Dried Tomato Pesto
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Yield: 4
Ingredients: For the Sun-Dried Tomato Pesto (makes 1-1/2 cups):; 1 (8.5-ounce) jar sun-dried tomatoes packed in olive oil; 2 cloves garlic; ½ teaspoon salt; ¼ teaspoon crushed red pepper flakes; ½ teaspoon sugar; 1 cup packed fresh basil leaves; ¼ cup + 2 tablespoons pine nuts; ⅓ cup freshly grated Parmigiano-Reggiano; 2 tablespoons water; For the Grilled Cheese Sandwiches:; 8 slices Italian bread; 4 tablespoons softened butter; 8 oz Fontina or Gruyere (or any good melting cheese), sliced or grated; ½ cup sun-dried tomato pesto