Drain and chop the tomatoes. Set aside 4 tablespoon. Heat the butter and sauté the onions until translucent. Add the tomatoes, half of the corn and the basil strips, season with herbs, salt and pepper. Simmer uncovered for approx. 20 minutes, until the sauce is creamy. Puree the sauce, briefly heat the reserved tomatoes and the remaining corn in it, season with salt and pepper.