Prepare ingredients: Chop crab meat, dice hard-boiled eggs, and finely dice onion.
Drain and rinse: Ensure corn and peas are well-drained before using.
Combine in a bowl: Add crab meat, eggs, onion, and corn to a large mixing bowl.
Add dressing: Stir in mayonnaise and horseradish sauce.
Gently fold in peas: Add them last to prevent breaking.
Mix well: Ensure all ingredients are evenly coated.
Chill if desired: Let the salad rest in the fridge for enhanced flavor.
Serve and enjoy: Perfect with crackers, toast, or as a side dish!