01 -
Heat grill to 450°F. Season steak and grill 4-5 minutes per side to 125°F. Let rest 10 minutes.
02 -
Mix sour cream, horseradish, dijon, vinegar, worcestershire, chives, salt and pepper.
03 -
Slice baguette. Brush with butter-oil-garlic mix. Bake at 375°F for 5 minutes each side.
04 -
Cook onions in oil and butter 15-20 minutes until soft. Add sugar and cook 3-4 more minutes.
05 -
Top each toast with sauce, steak slices and onions. Add chives and balsamic drizzle.