Cheesy Baked Mashed Potatoes Recipe

slices bacon, diced into 1 inch pieces

russet potatoes, peeled and cut into chunks

unsalted butter, plus more for baking dish

heavy cream

shredded sharp cheddar cheese, divided

shredded gruyere cheese, divided

shredded havarti cheese, divided

green onions, diced

fresh cracked pepper and kosher salt