Step 1

Make the caramelized onions (if using). Heat olive oil in a saucepan or frypan on medium heat and add the sliced onions and salt. Cook stirring occasionally on medium/low heat partially covered until melted and caramelized which could take up to 20 minutes. Set aside.

Step 2

Butter a 13x9 baking dish (or one that fits the shape of your rolls snugly) and preheat your oven to 350°.

Step 3

Make the butter and mustard sauce: grate your onions on the small homes side of a box grater or mince finely in a small food processor or by hand and add to the rest of the ingredients and mix together well with a small whisk.

Step 4

Most slider rolls come in the package not sliced so carefully with a serrated knife, cut the rolls evenly in half. Place the bottom half in the buttered dish and layer with ham, caramelized onions (if using), cheese then pickle slices and end with the roll tops.

Step 5

Brush the vegan butter and mustard sauce all over the top with a small pastry brush or spoon and make sure to coat the sides as well. Cover the entire dish with foil and bake for 25 minutes then uncover and bake for five additional minutes to brown the rolls a bit. All ovens vary so it could take more or less time depending on using convection heat and your oven brand. If the cheese doesn’t look melted enough bake for a few more minutes. Cut the sliders out all the way through then serve immediately.