Place your diced beef into a bowl and add in your flour, salt, pepper, and garlic powder. Combine and ensure the beef is coated in the mixture.
Place an oven-proof pan (that has a lid) on medium heat and drizzle with olive oil. Add in your floured beef and fry on each side for a few minutes until golden on the outside. Then remove and set aside on a plate. Preheat the oven to 160C/320F or 140C fan.
In the same pan, add in your chopped mushrooms followed by a slab of butter.
Once the butter has melted, add in your garlic, chopped onions, and fry for 5 minutes.
Add back in your beef, followed by your beef stock, red wine (or red wine stock pot), water, Worcestershire sauce, balsamic vinegar, and sugar. Season with salt and pepper.
Add your carrots into the stew and combine. Place the lid on your pot and into the oven for 2 hours.
When you have around 10 minutes until your timer is up, make your dumplings. Combine the self-raising flour, baking powder, suet, herbs, garlic powder, salt, and milk in a bowl. Once you have a sticky but firm dough, roll into 6 balls. Coat your hands with flour to prevent the dough from sticking to your hands.
Once the timer is up, remove your stew from the oven and lift off the lid. Give the stew a stir and use a spoon to taste the stew, season according to your preference. Place your dumplings evenly scattered on top of the stew and place the lid back on the pot. Place in the oven for 10 minutes, then remove the lid and place back in the oven for a further 10 minutes until your dumplings are cooked through. Serve up and enjoy!