De-gill and destem the mushroom caps, then set aside.
Slice your tomato.
Cook sliders and mushrooms in separate pans over medium heat.
Once done, remove the mushrooms and spread the aioli on them (about ½ tbsp per cap)
Melt cheese on the sliders and when melted place one on each mushroom cap.
Cook bacon in empty pan while cutting tomato slices in to quarters.
Finish layering the sliders (mushroom, aioli, slider, cheese, tomato) and then remove the bacon.
Top off each with a slice of bacon and hold in place with a toothpick if you choose!