This dish is best served immediately once the eggs are freshly poached. Store components separately for up to three days, covered in the refrigerator; do not freeze. To reheat, warm the hollandaise over a double boiler while whisking vigorously, re-poach eggs briefly in simmering water, and toast the English muffins just before serving. If preferred, use individual egg poachers or baskets for convenience. The hollandaise will hold for about 30 minutes if kept covered in a warm ceramic dish.