Pomodoro | Toffee bits | Umami

Ingredients

• 10 ripe red plum tomatoes
• ¼ cup extra-virgin olive oil
• 1 medium yellow onion, peeled and finely chopped
• 4 garlic cloves, peeled and crushed
• ¼ teaspoon red pepper flakes
• 1 (28-ounce) can peeled plum tomatoes and their juices
• Salt and freshly ground black pepper to taste
• 2 tablespoons (¼ stick) unsalted butter
• 6 fresh basil leaves, gently torn into a few pieces