Combine the olive oil, white vinegar, sugar, and soy sauce in a jar. Shake well until the sugar dissolves to make the dressing.
Melt the butter in a large skillet over medium heat. While the butter melts, crush the ramen noodles inside the package and discard the seasoning packet. Add noodles, almonds, and sesame seeds to the melted butter in the skillet.
Sauté the mixture while stirring frequently until the noodle mixture is golden brown. Remove from heat and let cool.
Shred the Napa cabbage and combine it with the sliced green onions in a large bowl. Add the cooled noodle mixture and pour the dressing over everything. Toss well to combine, sprinkle extra green onions on top, and serve immediately.
Notes
This ramen noodle salad is best served fresh but can be refrigerated up to one day. Enjoy as a side dish or light meal during warmer months!