Set oven to 350F.
Wash mushrooms in cold water and remove the stems from the caps using a knife . Then, use a small spoon to gently scrape the interior of the mushroom until it is white.
Build your slider: first one part of the mushroom cap (round side down), few leaves fresh basil, 1 slice Roma tomato, 4oz shaved meat, add 1/2 oz mozzarella slice, 1 tbsp marinara, the other mushroom cap to serve as the bun.
Skewer with a kabob stick and place on a baking sheet.
Use foil to prop the sliders up to prevent them from rolling around the pan.
If desired, sprinkle with Italian seasoning. Repeat for the other two sliders.
Bake in the oven for 15 minutes.