01 - Set oven temperature to 375°F for baking the dip and crostini.
02 - Combine cream cheese, mayonnaise, and sour cream in a large mixing bowl. Beat until completely smooth and creamy.
03 - Blend in Worcestershire sauce, hot sauce, Dijon mustard, garlic powder, onion powder, paprika, black pepper, salt, and lemon juice until well incorporated.
04 - Gently fold in the crab meat, Parmesan cheese, chives, and parsley, being careful not to break up the crab lumps.
05 - Transfer the dip mixture to a 1-1.5 quart oven-safe baking dish. Spread evenly and smooth the top surface.
06 - Evenly distribute the mozzarella cheese, Parmesan cheese, and panko breadcrumbs over the surface of the dip.
07 - Bake for 18-20 minutes until the topping is golden brown and the dip is bubbling around the edges.
08 - While the dip bakes, arrange baguette slices on a baking sheet. Brush lightly with olive oil and toast for 7-8 minutes, turning once, until golden and crisp.
09 - Remove the dip from the oven and allow it to cool for 5 minutes. Serve warm alongside toasted crostini and assorted crackers.