Heat a large nonstick skillet over medium-high heat. Add 2 teaspoons oil to pan; swirl to coat. Add ginger and garlic; cook 1 minute, stirring constantly. Add beef; cook 5 minutes or until browned, stirring to crumble.
Combine remaining 1/2 teaspoon oil, sugar, and next 4 ingredients (through pepper) in a large bowl. Add beef mixture, onion, and cilantro; toss well. Place 2 cabbage leaves on each of 4 plates; divide beef mixture evenly among leaves. Top each serving with 1 1/2 teaspoons peanuts.