Roughly chop the drained peppers and add them to the pot along with the diced tomatoes, vegetable stock, salt and pepper. Bring to a boil, then reduce the heat and simmer for 15 minutes.
1 jar roasted red peppers
1 can (14 oz / 400 g) diced tomatoes
2 cups vegetable stock
½ teaspoon salt
¼ teaspoon freshly ground black pepper