Potato Skins with Broccoli Pesto

Scrub the potatoes and prick all over with a fork. Microwave at high heat for 8 minutes, or until tender throughout. Alternatively, bake the potatoes in a 350 ° oven for about 1 hour. Transfer the potatoes to a work surface and let cool slightly. Meanwhile, in a large pot of boiling salted water, cook the broccoli until tender and bright green, about 4 minutes. Drain the broccoli, reserving some of the cooking liquid. In a food processer, process the garlic until minced. Add the broccoli and pulse until chopped. Add the parsley, basil, lemon zest, lemon juice and 1 tablespoon olive oil and puree until smooth, about 2 minutes; scrape down the side of the processor bowl as needed. If the pesto seems dry, add some of the cooking liquid. Season with salt and pepper and transfer to a bowl. Preheat the broiler. Halve the cooled potatoes lengthwise. Using a small spoon or scoop, carefully remove some of the potato flesh from each potato half, leaving a shell about 1/4 inch thick. Cut each potato half crosswise into 3 equal pieces. Put the potato pieces skin side up on a baking sheet and brush the skins lightly with oil. Broil until crisp and golden in spots, about 2 minutes. Turn over the potato shells on the baking sheet and fill each shell with about 1 tablespoon of the pesto. Sprinkle the filled potato shells with the cheese. Broil until the pesto is bubbly and the cheese is melted and golden brown, 2 to 3 minutes. Serve the potato skins hot.