Preheat the oven to 350 degrees Fahreinheit.

In a food processor or blender, process the ends of the loaf of bread to fine crumbs, about 1/2 cup. Set the remaining bread aside.

In a large bowl, combine the olive oil, meat, egg, cheese, parsley, garlic, oregano, thyme, salt, pepper and breads crumbs. Mix with your hands to combine well. Roll the meat mixture into 1-inch balls and reserve on a baking sheet.

Roll the meat mixture into 1-inch balls and reserve on a baking sheet. Lay two slices of bread on work surface. Butter one side of each piece.

Place four meatballs on the buttered surface of the slice of bread.

Top with a second slice of bread, buttered side down, and press firmly to adhere. Use a serrated knife to cut the crusts from the bread. Bake the crusts separately

Cut the sandwich into four equal squares. Transfer to a parchment-lined, rimmed baking sheet

Repeat with the remaining meatballs and bread. This process can be assembly-line style, lining up slices of buttered bread and assembling a number at a time.

Prepare two baking sheets at a time if possible.

Necessary, until all sandwiches are cooked. Remove from the pan and cool. Serve slightly warm.