Salt beef with 2 tsp salt. Heat oil in a large stockpot over medium-high heat. Brown beef on all sides and remove. Be careful not to crowd them in the pot!
Add potatoes, carrots, and onions to pot. Cook stirring frequently for 10 minutes and remove.
Add garlic to pot and cook 1 minute or until fragrant. Add tomato paste, beef stock, red wine, Guinness, and thyme. Return meat to the pot and bring to a boil, then reduce to a simmer and cover. Let cook 1 hour or until meat begins to get tender.
Add vegetables back to pot and let cook until potatoes, carrots, and beef are tender. Salt to taste.
Depending on the saltiness of your beef stock you may want to adjust the salt initially added to the beef, and at the end of cooking, to taste.
Keyword beef stew, irish stew, Saint Patrick's Day