In a 9-inch baking pan, stir together all marinade ingredients.
Add the chicken breasts to the marinade, turning once to coat.
Marinate in the refrigerator for at least 45 minutes.
Prepare the grill for cooking.
Remove the chicken from the marinade and drain off excess marinade.
Grill the chicken for 7 minutes, then turn and continue grilling until fork-tender.
Top each piece of chicken with Cheddar cheese and continue grilling until the cheese melts.
Serve the grilled chicken breasts with salsa on the side.
Notes / Tips / Wine Advice:
Wine Advice:
Pair these spicy Southwest grilled chicken breasts with a light-bodied red wine like Sangiovese or a crisp and refreshing white wine like Sauvignon Blanc to balance the heat of the chilies and the richness of the cheese.