How to Make It
Preheat the oven to 425°. On a baking sheet, toss the sweet potatoes with 2 tablespoons of the olive oil and season with salt and pepper. Roast for 25 to 30 minutes, turning occasionally, until tender and golden brown.
Meanwhile, in a pie plate, toast the almonds for about 3 minutes, until lightly golden; let cool completely. In a food processor, pulse the almonds with the basil and garlic until finely chopped. With the machine on, drizzle in the remaining 3/4 cup plus 2 tablespoons of olive oil. Transfer the pesto to a small bowl, stir in the cheese and lemon juice and season with salt and pepper. Serve the potatoes with the pesto.