Beef Bites with Creamy Horseradish Sauce

[b]1 cup sour cream
1/4 cup prepared horseradish sauce
1 french bread (18 inches) cut into 24 slices-toasted
1 lb. roast beef, thinly sliced-cut into 2 inch wide strips
1/4 cup green onion slices

Mix sour cream and horseradish sauce. Spread each toast slice with 1 teaspoon of sour cream mixture; top with 1 or 2 beef . Top evenly with sour cream mixture; sprinkle with onions.[/b]