glassify

verb

Infinitive:   glassify
3rd person:   glassifies
Present:   glassifying
Gerund:   glassifying
Past:   glassified
Perfect:   glassified

To transform something into the glass, cover it in glass, give it a glassy translucence, glass-like touch / appearance / brittleness / other glass-related properties.  To undergo or perform glassification.

Examples: 

Five minutes of microwave-boiling is enough to "glassify" the onions, penetrate them with sweet and sour relish, and melt the cheese into a softish consistency.  A 10- to 30-minute coddle in a stewpot will leave the onions soft-steamed; a similarly scheduled oven-baking will also create a golden crustation.  (Source: J∙ Okram - Mayonnaise Stew  ●  Cooking Recipe.)