Roast Beef Appetizer Sandwiches

This roast beef sandwich is an easy dish to prepare for an appetizer buffet. It’s one of my favorite appetizers because it can be assembled and plated an hour or two before guests arrive. I generally cut each sandwich in half and use a decorative toothpick to garnish.

2 Large White Onions, Sliced Thin
2 Tbsp. Olive Oil
12 Onion Rolls
1 Cup Baby Spinach Leaves
2 lbs. Sliced Roast Beef
Horseradish Mayonnaise (store-bought)

Saute the sliced onions in a skillet with the olive oil over low heat for about 20 minutes, until the onion begins to caramelize (the onions will turn a light brown color). On a decorative platter, cut the onion rolls in half lengthwise. Layer with caramelized onions, baby spinach leaves and roast beef. Drizzle with horseradish mayonnaise to taste. Top with upper half of roll and cut in half to serve. This sandwich is best when served at room temperature.