Steak Appetizer recipe

I feel like sliced med-rare steak on crostini with bleu cheese spread would be good.

Or a sauteed mushroom and steak crostini.

Use a baguette cut on the diagonal. I like to brush them with a nice olive oil and grill them on both sides.

You can top with all sorts of different things.

Chimichurri works well.
Roast some tomatoes with some garlic and herbs, s&p and then you can rough chop chunky or puree. You can do that only or add a little blue cheese crumbles.
A little arugula on the bottom or top is a nice flavor to add with a garlic herbed aioli.

Really depends on the flavors you like.