This is great comfort food and easy to make either vegetarian or not. The lentils cook up firm but tender, and the veggies are crisp and bright. It's an easy recipe to put on the stove and simmer while you are busy elsewhere.
This is based on the original Bisquick Sloppy Joe Bake that you could get in the little yellow cookbook they sent out via postal mail. I looked for it but I couldn't find it so I dug out my copy from my personal cookbook. See my other recipe for baking mix if you do not want to use Bisquick.