Rinse lentils thoroughly under cold water.

Place the rinsed lentils in a large pot.

Add crushed tomatoes to the pot.

Dice the onion and add it to the pot.

Add the frozen chopped spinach to the pot.

Dice the carrots and add them to the pot.

Dice the celery stalks and add them to the pot.

Add the chicken bouillon cubes to the pot.

Season with garlic powder to taste.

Season with pepper to taste.

Add parsley flakes to taste.

Add enough water to cover all ingredients in the pot.

Cover the pot with a lid.

Simmer over low heat for approximately 2 hours, stirring occasionally to prevent sticking.

Serve hot.