Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.

In a mixing bowl, combine the cooked crab meat, mayonnaise, Dijon mustard, melted butter, chopped parsley, lemon juice, salt, and pepper.

Lay split English muffins cut side up on the prepared baking sheet.

Evenly spread the crab mixture over each English muffin.

Sprinkle shredded cheddar cheese over each muffin to cover the crab mixture.

Bake for 15-20 minutes until the cheese is bubbly and golden brown.

Remove from the oven and let cool slightly before serving warm.