Roast Beef Salad - cooking recipe

Ingredients

1 lb cooked beef, cubed (I like to use leftover eye of round)
1 cup sour cream
1 small red onion, coarsely chopped
3/4 teaspoon salt
1 1/2 tablespoons lemon juice
1 tablespoon horseradish (or more to taste)
1 dash pepper

Preparation

Mix all ingredients together and refrigerate at least 24 hours.
Stir.
Serve atop lettuce leaf or spoon onto toasted onion roll.