Lemon Butter Salmon in Parchment

stalks asparagus trimmed

slices red onion thinly sliced

salmon fillets

olive oil

lemon slices very thinly cut

kosher salt

freshly ground black pepper

sprigs fresh thyme

white wine use a good drinking wine (NOT cooking wine)

kosher salt

dark brown sugar

white wine; chardonnay or semi-dry

shallot or 1 tablespoon sweet yellow onion minced

butter unsalted (cut into 12 pieces)

heavy cream

lemon juice & zest