According to Killer Burger, the no-nonsense meat shack that recently took over Nasca’s corner digs on Northeast Sandy Boulevard, a burger ain’t a burger until it’s topped with crispy bacon, grilled onions, thick pickle slices and a slather of smoky, orange mayo-relish sauce…so that’s what every order starts with. Build on that crunchy, greasy, juicy base with everything from mild green chiles and Jack cheese (the Jose Mendoza, $7.95) to housemade sweet peanut-butter sauce. Lucky for purists, Killer’s one-third pound of moist, seared beef plopped atop a buttered, toasted Franz bun is good enough to stand alone, especially since each order comes with a bottomless side of thick, deeply golden, perfectly salted fries. Killer doesn’t do options; there are no salads, hot dogs or even onion rings (although there is a lone veggie burger). And you will drink soda or beer (there’s both Ninkasi and PBR on tap). It’s not fancy, folks—just killer.