Teriyaki London Broil

1 1/2 pound London broil (can use less-expensive cut of meat, just marinate it several hours)
Marinade:
1/2 C soy sauce
1 Tbsp brown sugar
1 1/2 tsp minced garlic
2 Tbsp lemon juice
1 1/2 Tbsp olive oil
1 C beef bouillon

Make slits about 1/8" deep around edges of beef. Combine marinade ingredients in shallow dish; mix well. Reserve 1/3 of marinade. Add beef to dish; turn to coat. Cover and refrigerate 10 minutes. Meanwhile, preheat grill or broiler. Remove beef; discard marinade. Grill or broil beef, basting with reserved marinade, about 5 minutes per side. Let beef stand 2 minutes. Slice diagonally across the grain.