Turn up heat and add in zucchini noodles. Don't be afraid it if seems that there isn't enough liquid for the noodles because the zucchini will release water and shrink once it starts to heat up. Cook for 3-5 minutes, stirring occasionally so that all zucchini cooks evenly, until your zoodles are cooked. Zoodles should be tender but still somewhat firm. If your sauce becomes too watery, you can drain some liquid out. If it isn't liquid enough, you can add another 1-2 tbsp of broth during the cooking.