Mushroom, Lentil, and Potato Soup Recipe

2 tablespoons olive oil

1 small onion

chopped

4 large fresh mushrooms

chopped

1 Yukon Gold potato

diced

½ cup dry brown lentils

1 clove garlic

2 tablespoons chopped fresh parsley

2 tablespoons chopped fennel greens

½ teaspoon salt

½ teaspoon ground black pepper

¼ teaspoon cayenne pepper

or to taste

¼ teaspoon ground turmeric

or to taste

3 cups water