Pasta with Pistachio Pesto

Name: Pasta with Pistachio Pesto
Ingredients: 1 1/2 cups unsalted, shelled roasted natural pistachios; 1 cup chopped tomato; 2 cloves garlic; a handful of fresh mint leaves; a handful of Parmesan, freshly grated; a pinch of crushed red pepper flakes; a pinch of freshly ground black pepper; 2 tablespoons olive oil (or more); 1 pound freshly cooked pasta