what is the best way to saute onions for fajita's and then keep them warm?

Answer 1

Saute them in olive oil, season with some grill spice like Mc Cormicks Montreal seasoning, place them in a preheated ceramic bowl, and cover with plastic wrap. This will hold them warm while you are finishing the meal.

Answer 2

I like to dress them with a little olive oil, salt, and pepper and put the slices under the broiler. Flip them over after they start to have little black spots. After the second side browns turn off the oven and leave them in. They'll stay warm for quite awhile in there if you don't open the door.