Melt butter in a skillet over medium heat. Add panko; stir constantly for 2 minutes or until golden. Remove from heat. Stir in zest and 1/4 teaspoon salt.
Fill a large saucepan 2/3 full of water; bring to a boil. Add remaining 1 tablespoon salt. Add beans; cook 2 minutes. Fill a large bowl 2/3 full of ice water. Transfer beans to ice water to cool; drain.
Add oil to a skillet over medium heat. Add beans; sauté, stirring constantly, 3 minutes or until heated. Add lemon juice and almonds; sauté 1 minute. Season with pepper. Add panko topping; serve.