Vegetarians and carnivores alike will love this ingenious twist on meat loaf. The meaty-flavored, umami-rich recipe received our Test Kitchen's highest rating. Though it does involve a few steps, they all add up to incredible flavor: Roasted bell peppers are slightly smoky, sweet, and silky; sautéed creminis have a concentrated mushroom flavor; and toasted walnuts offer hearty texture. Since you’ll already have your food processor out for finely chopping the mushrooms, you can also use it to chop the onion and walnuts. Do what you can to steal away a portion of leftovers into the fridge; it will make for a great “meat” loaf sandwich the next day.