Preheat the oven to 350 degrees F. Spread the almonds on a rimmed baking sheet and bake, tossing occasionally, until golden brown, 8 to 10 minutes.
Meanwhile, bring a pot of salted water to a boil. Add the pasta and cook as the label directs, then drain and rinse under cold water. Transfer to a serving bowl and toss with the olive oil, parmesan, lemon juice, shallot, thyme, 1 teaspoon salt and about half of the almonds. Season with salt and pepper. Top with the remaining almonds and the red pepper flakes.
Photograph by Anna Williams
Recipe courtesy Food Network Magazine