Heat oil in a large skillet over medium-high heat.
Add green beans and green onions to the skillet.
Cook, stirring often, until green beans begin to turn bright green and slightly char, about 5 minutes.
Season with lime juice, soy sauce, garlic, sugar, and salt and continue cooking until sauce starts to thicken, about 2 minutes.
Remove from heat.
Add chili crisp, lime zest, and sesame seeds to green beans and toss well.
Serve immediately or chill before serving.
