Pasta Salad with Sun-dried Tomatoes and Feta

Ingredients

• Black pepper, to taste
• 2 tablespoons red wine vinegar
• Pinch of crushed red pepper flakes
• 1/4 cup pesto sauce
• 1/2 cup chopped sun-dried tomatoes
• 1 pound tri-color rotini pasta
• 4 ounces crumbled feta cheese (reserve some for sprinkling on top)
• 1/4 cup extra-virgin olive oil, plus more as needed
• 2 heaping spoonfuls capers, chopped