Preheat oven 425. Wrap garlic cloves in foil and set on baking sheet. Brush onions with oil and place on baking sheet. Bake for 1 hour, until onions and garlic are lightly charred and soft. Let cool.
Peel garlic and place in food processor.
Add onions, vinegar and lemon juice. Puree until smooth.
With processor running, gradually add 1 ¼ c. of oil until incorporated. Season with salt and pepper.
Recipe by Geaux Ask Alice! at https://geauxaskalice.com/south-cobb-salad/