Step 1

Place a large saute pan over medium-high heat. Once hot, add in 2 tablespoons of olive oil, followed by the onions and bell peppers. Saute for 3-4 minutes, just until they are slightly soft but with a little bit of crunch left. Stir occasionally.

Step 2

Turn the heat down to medium-low and in the add salt, pepper, garlic powder, oregano, and Worcestershire sauce. Stir well and cook for one more minute.

Step 3

Dump the onions and peppers into a bowl and place the pan back over medium-low heat. Once hot, add 2 tablespoons of olive oil into the pan. Crumble the sausage into the pan and cook for around 4-5 minutes, just until hot. Do not overcook, or you can make the sausage dry.

Step 4

Add the ingredients into a small bowl and whisk until completely smooth.

Step 5

Place a small saucepan over low heat. Add all of the ingredients into the pan except for the parsley. Stir occasionally until the garlic powder and salt are somewhat dissolved.

Step 6

Remove the pan from the heat and add in the parsley. Stir well.

Step 7

Preheat the oven to 350 degrees Fahrenheit.

Step 8

Grease a 10-inch cast-iron skillet (or a baking/casserole dish of the same size) with vegan butter.

Step 9

Place the bottom halves of the slider buns down.

Step 10

Spread across half of the mayo sauce.

Step 11

Sprinkle across the shredded mozzarella, then the sausage, then the sauteed onions and bell peppers.

Step 12

Layer across the provolone cheese slices.

Step 13

Spread the other half of the mayo sauce onto the inside of the top half of the slider buns. Then flip this over onto the rest of the dish to cover it.

Step 14

Cover the sliders with tin foil and bake them on the middle rack for 25 minutes, rotating them halfway through.

Step 15

Remove and discard the foil, then brush the entire tops and edges of the buns with the garlic butter. Pop them back into the oven for another 10 minutes, rotating them halfway through. Please keep a close eye on them, so the tops of the buns do not burn. If they begin getting too dark, you can remove them from the oven before the 10 minutes are up.