5 minutes of prep for a rich, wholesome stew? You can't beat that.
Preheat oven to 375 degrees. In a large heavy pot, toss beef with flour. Stir in tomatoes, 1 teaspoon salt, 1/2 teaspoon pepper, and 4 cups water. Bring to a boil over medium-high, transfer to oven, and cook 1 hour. Stir in potatoes and cook until beef and potatoes are tender, about 1 hour more. Stir in peas and carrots and let sit 5 minutes before serving.
This can also be made in a slow cooker: Reduce water to 1/2 cup, add potatoes at the beginning with the other ingredients, and cook on high for 5 hours.