Beef Skewers with Peanut Dipping Sauce

Name: Beef Skewers with Peanut Dipping Sauce
Ingredients: 3 cloves garlic, minced; 1/4 cup plus 1 teaspoon soy sauce for dipping; 1 tablespoon toasted sesame oil; 1 teaspoon light-brown sugar; 1/2 teaspoon ground cumin; 1/8 teaspoon red-pepper flakes; 1 pound boneless rib-eye roast, sliced against the grain into 32 3-by-1/4-inch strips; 2 teaspoons canola oil; 1/3 cup reduced-sodium canned vegetable broth, or water; 1/4 cup smooth peanut butter; 1/2 teaspoon ketchup; 1/4 teaspoon rice vinegar; Coarse salt and ground pepper; Sesame Rice, for serving (optional)