Beet Bourguignon recipes

Name: Beet Bourguignon recipes
Ingredients: 2 tbsp olive oil; 1 yellow onion, chopped; 4 cloves garlic, minced; 8 small beets, peeled & quartered (we used Chioggia beets); 4 medium sized carrots, sliced in large pieces; 2 sprigs thyme; pepper; sea salt; 2 tbsp tomato paste; 1 cup red wine; 2 cups vegetable stock; 3 bay leaves; 2 tsp arrowroot powder, solved in 2 tbsp water (optional); 2 cups puy lentils, for serving; 4 cups water; a pinch of sea salt; 2-3 portobello mushrooms; 10 champignon mushroom; 10 small pearl onions, peeled