# Direction Steps:
01 - Preheat oven to 300°F. Line a baking sheet with parchment paper. Arrange tomato slices on the sheet, drizzle with olive oil, and season with salt, pepper, and oregano. Roast for 50–60 minutes, flipping halfway, until deeply caramelized but still holding shape. Cool slightly.
02 - Spread softened butter on one side of each bread slice. Place 2 slices butter-side down on a clean work surface.
03 - Spread 1 tablespoon pesto on each unbuttered side. Layer 2 slices mozzarella, roasted tomatoes, 2 slices cheddar, and spinach or arugula if using. Top with remaining bread slices, buttered side up.
04 - Heat a large skillet or griddle over medium-low heat. Add sandwiches and cook 4–5 minutes per side, pressing gently, until golden brown and cheese is completely melted.
05 - Slice sandwiches in half diagonally and serve immediately while hot.