1. Place pine nuts in a small skillet and toast over low heat until golden brown, taking care that they don't burn.
2. In the bowl of a food processor fitted with a metal blade, combine the pine nuts, parsley, garlic, miso, and lemon juice and puree. Slowly add the olive oil and process until smooth Add 1/2 tsp salt and set aside.
3. Preheat the oven to 400F. In a large bowl, combine the potatoes and the olive oil. Toss to coat. Transfer the potatoes to a parchment lined baking sheet and roast for 20 minutes, stirring after 10 minutes. Add the peppers to the baking sheet and stir to combine. Roast for 1 hour, stirring every 15 minutes, until the potatoes are tender and the peppers are roasted.
4. Transfer the potatoes and peppers to a large bowl, add 1/2 cup plus 3 tbsp pesto, stir well and season with salt and pepper to taste. Serve at room temperature. Cover the remaining pesto with a film of olive oil in a tightly sealed container and refrigerate for up to two weeks.
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Roasted Red Potato Salad with Parsley-Pine Nut Pesto recipe