Beef with thyme

3 lbs corned beef brisket , cubed 4 tablespoons olive oil 2 quarts beef broth salt & freshly ground black pepper, to taste 1 teaspoon dried oregano 1 teaspoon[...]

1 4-to 4 1/2-pound flat-cut (also called first-cut) beef brisket, trimmed of most fat 2 tablespoons olive oil 1 14 1/2-ounce can diced tomatoes in juice[...]