Oven-baked slider sandwiches are among my favorite party foods.  For one, they are SUPER easy to make.  Additionally, you can make them ahead of time and pop them in the oven when your guests arrive, so you aren’t left frantically prepping and finishing last-minute details.  After a mere ten minutes in the oven, these are warmed through and the cheese is melty and bubbly.  They’re awesome. I like Havarti with deli turkey because it’s a smooth, mild cheese and works really well with the pesto.  I’ve…