Preheat gas grill to medium-high heat (450 F) or an oven to 425 F.
Butterfly cut the chicken breasts, lightly pound to thin them.
In a bowl, combine the Mazola® Corn Oil, salt, pepper, oregano, garlic powder and lemon juice.
Place one chicken breast and 1/4 of the asparagus on a piece of foil and brush with the oil/ spice mixture. Wrap the packets to close. Repeat with the remaining chicken.
Grill the foil packets for 10 minutes per side, turning once (20 minutes total) or bake in the oven for 40-45 minutes, until chicken is fully cooked. Serve immediately. Top with parsley (optional).