In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.
Q: Heat olive oil in a large, heavy skillet over high heat.,Add onions; stir-fry 2 minutes.,______,Stir in barbecue sauce; cook 1 minute.,Remove from heat.,Cover; keep warm.,Meanwhile, prepare a grill or grill pan for medium-high heat.,Lightly mix turkey, milk, parsley, paprika, salt and pepper in a large bowl; form into 4 patties.,Grill until just cooked through, turning once, about 8 minutes.,Place on bun bottoms; top each with onions and top buns.
A: 
Reduce heat to medium-low; cook, stirring often, until soft and starting to caramelize, about 15 minutes.