1Over medium high heat, sauté beef in 1 tbsp. olive or peanut oil with onion and chopped or sliced pepper; add garlic when onions become translucent. Reduce heat to a simmer and continue to cook until beef is tender, adding a few tablespoons of beef broth, if needed.
Stir together remaining beef broth and water, cornstarch and soy sauce until smooth. When beef is tender, stir the liquid in. Stir in sherry. Simmer for 10 minutes or until sauce has thickened to desired consistency. Stir in cooked linguine.