Instant Pot Method:Add potatoes and broth to the bottom of the instant pot topped with cauliflower and garlic. Cook on manual for 8 minutes (it will take about 12 minutes to come to pressure) and then do a quick release by releasing the steam valve once the timer has completed. Add avocado oil, salt and pepper. Blend in a food processor or bender for a few seconds until creamy.
Stovetop Method: Add potatoes and broth to the bottom of a large pot topped with cauliflower and garlic. Bring to a boil then cover with lid and simmer on medium-low for 40 minutes or until the potatoes and cauliflower are soft if you poke them with a fork. Add avocado oil, salt and pepper. Blend in a food processor or bender for a few seconds until creamy.
Shepherd's Pie
Preheat: Preheat oven to 400° F.
Cook meat: Cook ground beef on the stovetop and set aside once cooked to your liking.
Sauté: Sauté onion, zucchini, carrots, celery and sea salt on medium heat until the onions are translucent. Add garlic, thyme and rosemary and sauté for 2 minutes more. Add beef, peas, tomato paste, broth, Worcestershire sauce and black pepper. Simmer on low for 3 minutes.
Assemble: Add mixture to a large baking dish and top with mashed cauliflower-potatoes.
Bake: Bake at 400° F for 25 minutes. Rest for at least 10 minutes. The longer you let this dish rest, the more it will stay together when it is served.
Notes
Beef substitutions: lentils (for a vegan / vegetarian option), extra veggies (double the carrots, celery & zucchini), ground lamb, ground chicken, ground turkey, minced meat
Worcestershire sauce substitutions: miso, soy sauce, red wine vinegar, ketchup (I have not tested any of these, you'll need to taste as you go to add some tangy saltiness to the filling)
Storage: freeze for up to 3 months or in the fridge for up to 3 days