Cooking spray
2 cups loosely packed fresh sage leaves
1/2 cup pine nuts, lightly toasted in a dry skillet for 3 minutes
1/3 cup olive oil, plus extra if needed
4 garlic cloves, peeled
3 tablespoons grated Parmesan
2 turkey tenderloins, about 1 pound each
8 small red potatoes, halved
Salt and freshly ground black pepper