3rd person: glassifies
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.
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.)