Wash the green beans thoroughly under cold water.
Trim the ends of the green beans.
Bring a pot of salted water to a boil.
Add the green beans to the boiling water and blanch for 2-3 minutes.
Prepare an ice bath in a large bowl with cold water and ice.
Transfer the green beans to the ice bath immediately.
Drain the green beans and pat them dry.
Combine the green beans, diced red onion, and toasted almonds in a mixing bowl.
Whisk together olive oil, lemon juice, salt, and pepper in a small bowl.
Drizzle the dressing over the salad and toss gently to combine.