January Lentil Stew

Name: January Lentil Stew
Ingredients: 1 cup dry lentils; 1 medium yellow onion; 2 cloves garlic; 1 cup celeriac (Zucchini or eggplant would also work); 2 large carrots; 2 medium yellow beets (Red will do just fine); 1 tbsp butter; 1 tbsp olive oil (Coconut oil would also work nicely here); 1 tbsp fresh tarragon (If using dried, use 1/2 tbsp); 1/2 tsp cumin; 1 tsp ground chile peppers; Salt & pepper; 5 cups vegetable stock; 1/4 cup red wine (Optional but highly recommended); 12 small cremini mushrooms