Preheat oven to 425º Place onion pieces in a
large bowl, drizzle with oil & sprinkle 1/2 tsp. salt.
Toss to coat. Remove papery skin from garlic
but leave whole and wrap in aluminum foil.
Place onion pieces and wrapped garlic
head on baking sheet & bake at 425º for
1 hour. Let cool for 10 minutes and chop
onion. Separate garlic cloves & mash the
pulp. Discard the skin.Combine onion, garlic,
the rest of the salt, sour cream, parsley, &
juice in large bowl. Cover & chill at least one hour.