Remove the lid and any sauce container inside the box. Heat in the microwave for 90 seconds or until hot all the way through. Our plant fiber box is microwave safe. Stove: Place the contents into a sauté pan with 1 teaspoon of water. Heat covered on low for approximately 3 minutes or until hot all the way through. Oven: Preheat your oven to 350 degrees, then empty the contents onto your favorite baking dish. Heat for 5-7 minutes or until hot all the way through.