Freeze any leftover tomato paste so you can use it later. Spoon tomato paste into ice cube trays and place in the freezer for 2-3 hours, or until completely frozen. Transfer the cubes into a sealed container and store them for up to 6 months.
Lentils can be dried or canned. If you use dried lentils, follow the cooking instructions on the package and add them in at the same step as the canned lentils.
Don’t have frozen peas and carrots? Use any other fresh or frozen vegetable you like. Just make sure to chop the vegetables into small pieces and cook them until tender.