This is an easy way to enjoy stuffed pepper flavors, and because the prep work is so simple, the recipe takes about half the time as traditional stuffed peppers. The casserole is made with ground beef, rice, tomatoes, and cheese, along with peppers and seasonings. This casserole riff is made with all of the familiar ingredients you would expect from classic baked stuffed peppers. If you are heading to a potluck or a need an easy meal for a family dinner or party, use this recipe. It's also quite flexible. Two large bell peppers are used for the dish, one green, and one red, but you could use more or use whatever colors you have on hand. If you prefer not to use beef, some ground turkey would also work well in the recipe. If you want to make a vegetarian version, use crumbed tofu or another meat substitute in place of the ground beef. The texture might be a bit different but the casserole is so flavorful, it will still be tasty. Any leftover casserole can be stored in a sealed container in the refrigerator. If you have a large quantity, the casserole will freeze nicely. To reheat a frozen casserole, defrost it on the counter and then heat in a foil-covered baking dish until warmed throughout.