Cook mirepoix in a hot oiled pan until soft
Add tomato paste and cook for a minute
Add 1 cup water, tomatoes, and lentils. Bring to a boil then reduce to a simmer.
Cook, covered, for 15 minutes, stirring occasionally and adding water as needed.
Add spinach and cook, covered for a couple of minutes to wilt.
Mix in spinach and continue cooking until soft.