Place the garlic in aluminium foil and seal well.
Roast bell pepper and garlic in the oven or air fryer at 190 degrees Celsius until charred and the garlic is soft. 40-50 minutes.
Let them cool slightly, remove the skin from the bell pepper.
Squeeze the roasted garlic out from the skin into a high speed blender together with the remaining ingredients except for the water and cream. Blend until smooth.
Preheat a nonstick pan over medium heat, pour the bell pepper and sun-dried tomato sauce into the pan and bring to a simmer. Keep simmering on low heat for 20-25 minutes. Taste to check if more seasoning is needed and add water as needed.
Meanwhile fry gnocchi in oil or butter in a skillet. Or place gnocchi on an oven/air fryer safe baking dish, drizzle with oil/butter and bake in the oven at 200 degrees Celsius for 20-30 minutes or air fryer 190 degrees Celsius for 10-13 minutes. Stir 2-3 times if baking in the oven/air fryer.
Add the cream to the bell pepper tomato sauce, stir to combine and cook for 3-5 minutes more.
Add the sauce at the bottom of two plates or bowls. Add cherry tomatoes.
Next divide the gnocchi between the two plates and top with pieces of buffalo mozzarella, pistachio nuts, fresh basil and freshly ground black pepper.