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Ingredients
- 3 Tablespoons unsalted butter
- 1 large Vidalia or other sweet onion, chopped
- 2 medium yellow onions, chopped
- 1 clove garlic, minced
- 1 Tablespoon white wine vinegar
- 3/4 cup sour cream
- 1/4 cup mayonnaise
- 2 Tablespoon freshly grated Parmesan cheese
- 2 Tablespoons Dijon mustard
- 1 Tablespoon chopped fresh chives, plus more for garnish
- 1/2 teaspoon kosher salt
- 1/4 teaspoon freshly ground black pepper
- 1/2 teaspoon Tabasco sauce or to taste
Preparation
Step 1
In a large skillet over medium heat, melt the butter. Add the onions and garlic and cook uncovered, stirring occasionally, for about 1 hour or until caramelized. (Do not rush the caramelization by turning up the heat; you risk burning the onions.)
Add the vinegar and cook until it evaporates, about 1 minute. Remove the skillet from the heat and add the remaining ingredients. Taste for seasoning and adjust as needed. Garnish with chives and serve warm or at room temperature. Enjoy!