Step 1

Cut the potatoes and parsnips into equal sized chunks. Place them into a large pot, cover with cold water, and add a large pinch of salt. Bring to a boil and simmer until the vegetables are fork tender, about 20 to 30 minutes.

Step 2

Meanwhile, heat oil in a large skillet over medium-high. Add onion and mushrooms; cook until onion softens and mushrooms are golden, about 8 minutes. Add garlic and tomato paste; cook until paste turns brick red, about 4 to 5 minutes. Add wine, 1 Tbsp. rosemary, thyme, 1/2 tsp. salt, and pepper. Cook until wine reduces by half, about 2 minutes. Whisk broth, flour, and soy sauce in a bowl, and pour into pan. Simmer until mixture thickens, about 6 to 7 minutes. Stir in lentils, and remove thyme stems from pan.

Step 3

Drain potatoes and parsnips and place back in hot pot. Add milk, butter, remaining 1/2 tsp salt, and 2 tsp rosemary. Use a potato masher to thoroughly mash. Divide evenly between each of 4 plates. Spoon lentil and mushroom mixture overtop. Garnish with additional herbs, if desired.