I’m currently poor and have been given green lentils, I need cheap recipes!

Things haven't been going well. The bills a are paid but I've stopped grocery shopping and turned off the heat to get through. A friend gave me some green lentils and I have some sweet and red onions, lemons and limes in my fridge, a little garlic and about $10 for more food. What can I do to make it until pay day? I love lentils but don't have the fresh things I usually make them with.