These grilled marinated onions slices are so flavorful, you won't believe it! They have such a deep marinated flavor, and to top it off, they are grilled! These are the best onions ever, you'll never taste the onions better than these!
Pour the oil mixture over the onions and toss with your hands to coat.
Marinate onions in a refrigerator overnight or on the counter for 30 minutes.
Preheat the grill to medium-high.
Put the onion slices on several double sheets of foil and shape the sides of the foil so it resembles a plate (to make a double-sheet of foil, just take a big piece of oil and fold it in half).
Put the foil with the onions on the grill, and grill the onions uncovered for 15 minutes.