Gone are the days of tomato soup splattering in the office microwave. Prep and build these soup jars on Sundays, and you’ll have a warming, homemade lunch every day of the week. All you need to do is add hot water at lunchtime, which will cook the noodles and bring the flavors of the jar to life. Before digging in, drizzle with some soy sauce and sriracha (which you can keep handy at the office). Feel free to experiment with all sorts of veggies—both spinach and bean sprouts would be tasty additions. For bolder flavor, add more miso, or some chili-garlic sauce.