The only way to preserve eggplant is by freezing:
1. Wash, peel if desired, and slice 1/3-inch thick. Prepare quickly, enough eggplant for one blanching at a time.
2. Water blanch, covered for 4 minutes in one gallon boiling water containing 1/2 cup lemon juice (fresh or bottled).
3. Cool, drain and package, leaving 1/2-inch head space. Seal in zip closure freezer bags and seal and freeze.
For frying -- Pack the drained slices with a freezer wrap between slices. Seal and freeze.