My favorite easy chicken marinade is:
1/3 cup olive oil
1/4 cup lemon juice (fresh-squeezed is best, but bottled is fine)
4 large garlic cloves, minced
2-3 teaspoons Greek seasoning (I use Penzeys, but have seen others in the grocery store)
freshly-ground black pepper
This is enough for at least 1 to 1-1/2 pounds of chicken breasts.
Marinate in the refrigerator, turning occasionally, for at least 3-4 hours.
Remove from marinade, discard marinade, and grill chicken.
Can't you just eat what I put in front of you? Do you have to know what it is?
Ria Parkinson, Butterflies (BBC, 1978-83)