Miniature Meatball Panini

Ingredients

• 1 loaf thin-sliced white bread, such as pepperidge farm
• 2 teaspoons extra-virgin olive oil
• 1 pound ground pork, or a combination of beef and pork
• 1 large egg
• 1/4 cup freshly grated romano cheese
• 1/4 cup freshly grated parmesan cheese
• 1/4 cup finely chopped fresh flat-leaf parsley
• 1 clove garlic
• 1/2 teaspoon dried oregano
• 1/2 teaspoon dried thyme
• 1/4 teaspoon coarse salt
• freshly ground black pepper
• 8 tablespoons unsalted butter (1 stick)