Grilled Burgers with Hoisin-Stout Beer Sauce

Directions:

1. Make burgers by gently kneading together ground beef, 1 tablespoon hoisin sauce, 1 clove minced garlic, salt and pepper. Form into 4 patties.
2. Light grill to medium.
3. Light side burner.
4. In small saucepan, warm sesame oil over low heat. 
5. Stir in 2 cloves minced garlic and onion pieces; cook until aromatic, about 2 minutes. 
6. Stir in 3 tablespoons hoisin sauce, soy sauce and Stout Beer. 
7. In small bowl, dissolve cornstarch in rice wine vinegar; stir into Beer sauce. 
8. Increase heat to medium; bring sauce to a simmer. 
9. Let bubble for about 2 minutes until well thickened. 
10. Set aside until ready to serve.
11. Place burgers on the grill.
12. Cook burgers until to desired doneness. 
13. Place burgers on rolls; brush with sauce. 
14. Top with cucumbers and lettuce leaves. 
15. Serve remaining sauce on the side, if desired.