Oven baked 3-ingredient beef crostini is the kind of simple appetizer that earns a permanent place in the party rotation. It delivers crisp bread, savory roast beef, and gooey melted provolone in just a few steps, making it ideal for casual gatherings, game days, or a late-summer porch spread when you want something warm and satisfying without fussing over a long ingredient list.
Serve these crostini hot with a platter of pickles, marinated olives, or a simple green salad to balance their richness. They also pair nicely with tomato soup for a light meal, and for entertaining, they fit right in alongside sparkling water, iced tea, beer, or a crisp white wine.
Oven Baked 3-Ingredient Beef Crostini
Servings: 8 appetizer servings
Ingredients
1 baguette, sliced into 1/2-inch rounds
8 ounces deli roast beef, thinly sliced
8 ounces white provolone cheese, sliced or cut to fit the bread
Directions
1. Preheat the oven to 375°F. Arrange the baguette slices in a single layer on a large baking sheet.
2. Bake the bread for 5 to 7 minutes, just until the slices are lightly toasted around the edges but not deeply browned.
3. Top each toasted slice with a small fold of roast beef, then add a piece of provolone over the top so it covers most of the meat.
4. Return the baking sheet to the oven and bake for 5 to 8 minutes, until the cheese is fully melted and bubbling and the beef is heated through.
5. Transfer to a serving platter and serve right away while the crostini are crisp and the cheese is still gooey.
Variations & Tips
Add a spread: If you do not mind going beyond three ingredients, a thin swipe of horseradish sauce, Dijon mustard, or mayonnaise on the bread adds extra flavor and helps keep the crostini from tasting dry.
Try a different cheese: Mozzarella, Swiss, or fontina all melt well here. Provolone gives a classic deli-style flavor, but other mild melting cheeses work nicely if that is what you have on hand.
Use sturdier bread: A baguette is traditional for crostini, but narrow Italian bread or a French loaf can also work. Just keep the slices fairly even so they toast at the same rate.
Keep an eye on the oven: Because the ingredient list is so short, texture matters. Pull the bread once it is crisp at the edges, and do not overbake after adding the toppings or the roast beef can become dry.
Make party prep easier: Toast the bread a little ahead of time, then top and finish baking right before serving. That way the crostini reach the table hot and the cheese is at its best.