1. In a crusty manner.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• crustly,
• crustini,
• cruetly,
• constily,
• rustly,
• crystaly,
• trustily,
• trustly,
• crustilke,
• crustise,
• causticly,
• Rustily,
• Crustifik,
• crystily,
• cruztily,
• crustioly,
• custily,
• crustilly,
• crustilyy,
• crostiny

• crystal.

The adjective form of the word "crustily" is "crusty".