Because the spiciness of jalapeños varies from chile to chile, we try to control the heat by removing the ribs and seeds (the source of most of the heat) from those chiles that are cooked in the rice. Use an ovensafe pot about 12 inches in diameter so that the rice cooks evenly and in the time indicated. The pot’s depth is less important than its diameter; we’ve successfully used both a straight-sided sauté pan and a Dutch oven. Whichever type of pot you use, it should have a tight-fitting, ovensafe lid. Vegetable broth can be substituted for chicken broth.