French Dip Sliders for a crowd using Hawaiian Rolls Recipe. If you've ever had French dip sandwiches, you know what a crowd-pleaser the recipes are. I mean, who doesn't like thinly sliced roast beef on a French roll, with jus for dipping? But sometimes you don't want to assemble individual sandwiches to serve to guests — like when you need appetizers for parties. and that's where this ingenious EASY recipe comes in.