Green Bean Casserole By: Barbi "Here is the easy version!" 1 can green beans 1 can Campbells Cream Of Celery Soup garlic powder onion powder Mix togehter and bake, covered for 40 minutes. Or, microwave it for about 5 minutes. Top with Lawry's French Fried Onions and bake, uncovered until they are crispy, about 5-10 minutes more. That's it! Youre done! Prep Time: 2.5 minutes Cook Time: Depends on your oven, how long it's in, and the temperature you use. I never worry about that, minor details like time and temp, just throw it in there! Anywhere from 300-400° is good, then check it every 20 minutes or so. The top will be getting a little brown, thats how you'll know it's done.