If you don't have an outdoor grill, you could easily use a grill pan on the stove, set to medium-high heat. In fact, that's the first way I made this recipe and it turned out delicious! The grill pan I have is this one from Lodge (affiliate link), it's cast iron so you can get it nice and hot, perfect for good grill marks! Alternatively, you could also cook the chicken in a cast-iron skillet set over medium-high heat.