How to Make It
Combine 1/4 cup stock and cornstarch in a small bowl, stirring with a whisk.
Heat oil in a large skillet over medium-high. Add beef; cook 5 minutes, stirring to crumble. Stir in Worcestershire sauce, 1/2 teaspoon pepper, 1/2 teaspoon salt, garlic powder, onion powder, and white parts of green onions; cook 2 minutes. Remove mixture from pan.
Add pearl onions to pan; cook 2 minutes. Add 2 cups tomato and ketchup; cook 3 minutes. Stir in cornstarch mixture, remaining 3/4 cup stock, remaining 1/2 teaspoon pepper, and remaining 1/4 teaspoon salt. Cook 3 minutes or until thickened. Stir in beef mixture, green parts of green onions, and remaining 1 cup tomato. Sprinkle with chives.