Step 1: Preheat your oven to 375°F (190°C) for even cooking and a golden-brown crust.
Step 2: In a mixing bowl, combine mayonnaise, shredded Cheddar Jack cheese, grated Parmesan, chopped parsley, seasoned salt, black pepper, softened butter, and chunky garlic paste. Mix until creamy.
Step 3: Place Texas Toast slices on a baking sheet and generously spread the cheesy mixture over each slice.
Step 4: Bake for 10-12 minutes, until cheese is melted and bubbly, and the edges are golden brown.
Step 5: Remove from oven, let cool for a minute, and garnish with fresh parsley before serving. Cut into halves or quarters for sharing.
