fika cafe , at the american swedish institute, is not your run-of-the-mill museum restaurant. instead of mediocre sandwiches and lackluster pizza served cafeteria-style, patrons are treated totableservice and elegantly plated new nordic cuisine. the salmon smörgås is as far from a typical american sandwich as minneapolis is from stockholm. a lightly breaded piece of seared salmon rests delicately atop a thick piece of dense, crumbly house-made rye bread and a bed of watercress, drizzled with a mustard sauce and garnished with a dollop of beets.