Rinse meat under cold water to get rid of any left over meat juices and pat dry with a paper towel.
Heat pan with olive oil on high heat.
Season meat with flour, sea salt, black pepper, paprika and garlic powder. Coat both sides and place roast on a frying pan to brown.
Once brown, flip over and let sizzle to brown the other side.
You can also brown sides of roast if you wish.
Once meat has been browned, place in a crockpot on high heat.
Take sliced onion and place in the same pan where you browned your beef chuck with fresh thyme, rosemary, parsley and bay leaves. Let sauté for 2-3 minutes to capture all the left-over flavor from the pan.
Shut off heat and toss onion mixture into the crockpot on top of roast.
Add sliced mushrooms and remainder of ingredients. Mix well and place the lid over the crockpot.
Cook for 6-8 hours.
Prepare your potatoes by peeling and cutting them into cubes. Rinse and place in pot. Add salt and bring potatoes to a boil. Follow instructions above in my blog post on how to check if your potatoes are cooked.
Once cooked, drain potatoes in a colander.
Use a food mill or potato ricer to get a nice, smooth, lump free mashed potato.
In a small saucepan, heat up milk and 4 tsp of salted butter. Add milk and butter to mash potatoes slowly until you reach your desired texture.
Ladle roast over a bed of mashed potatoes.
Bom apetite! Enjoy your meal!