In a large saucepan over medium heat, sauté shallots, onions and garlic in avocado oil until lightly browned and fragrant.
Add carrots, celery and zucchini, stir and cook for a few minutes.
Add chopped mushrooms and cook until tender.
Stir in rosemary, thyme, smoked paprika, miso, balsamic and maple syrup and stir well until all the veggies are coated.
Add chopped tomatoes and tomato paste and cook for a few minutes.
Add stock, stir, cover and cook for 10 minutes.
Finally stir in the kale, peas, corn, lentils, salt and pepper. Cover and cook for 15 minutes. Don’t overcook the veggies and the lentils should be al-dente.
Remove the lid and continue simmering uncovered, stirring frequently, to evaporate any excess liquid.
Preheat oven to 425°F and lightly grease a 9×13 oven proof baking dish.
Transfer the filling to prepared baking dish and top with mashed potatoes. Smooth down with a spoon or fork and season with sea salt and paprika.
Place on a baking sheet to catch any overflow and bake for 15 minutes until bubbly and the mashed potatoes are lightly browned on top.
Let cool for a few minutes before serving.