Heat oil in a medium skillet. Add onions and cook 3-4 minutes, stirring occasionally.
Salt and pepper thighs then place in skillet with onions. Cover and cook on medium/low 2-3 minutes. Uncover and cook until chicken temp reaches 165 degrees F- about 10 minutes.
Using 2 forks, shred chicken then stir in BBQ sauce. Top with cheese and cover 1-2 minutes to melt cheese
