Ingredients

• 1/2 (16 ounce) package whole-wheat angel hair pasta
• 2 tablespoons olive oil
• 1/2 large onion, sliced
• 2 cloves garlic, minced
• 1 teaspoon red pepper flakes
• 1 tablespoon drained capers
• 1 (2 ounce) can anchovy fillets, drained and quartered
• 1 cup canned diced tomatoes, undrained
• 2 cups coarsely chopped kale
• 1 (4 ounce) can sliced black olives, drained
• 1/2 cup grated Parmesan cheese, or to taste