Roasted Tomato Puttanesca

Bahan-bahan (6 porsi)

• 12 ounces cherry or grape tomatoes
• 8 ounces fresh white button mushrooms, washed and quartered
• half on an onion, roughly chopped
• 1 tablespoon olive oil
• 1/2 teaspoon salt
• 1 pound spaghetti (reserve 1/2 to 1 cup pasta water)
• 1 14 -ounce can diced tomatoes
• 2 cloves garlic
• 1/2 teaspoon salt
• 1/2 cup pitted olives (optional)
• 3 tablespoons olive oil
• juice of 1 lemon
• 1 2 -ounce jar capers, drained and rinsed
• 1/4 cup butter
• fresh basil, Parmesan, for topping