Leftover Olive and Cheese Pasta - Mr. Cook

Ingredients

• 8 ounces spaghetti
• 1 tablespoon olive oil
• 1 teaspoon salt
• 2 tablespoons olive oil
• 1 red onion, thinly sliced
• 3 cloves garlic, minced
• 1 cup leftover olives, pitted and sliced
• 1 can diced tomatoes
• 1 teaspoon dried oregano
• ½ teaspoon dried chili flakes (optional)
• Salt and pepper to taste
• ½ cup grated cheese (such as Parmesan or mozzarella)