• 3 tablespoons olive oil
• 2 tablespoon white wine vinegar
• 1 teaspoon Dijon mustard
• 1/4 teaspoon kosher salt
• 1/2 teaspoon fresh ground black pepper
• 1/2 cup thinly sliced red onion
• 6 garlic cloves, thinly sliced
• 2 (9-ounce) package fresh spinach or 18 ounces spinach bunches, washed, stems removed

Whisk the first 5 ingredients together in alarge bowl. Place dijon mixture in a very large skillet over medium-high heat. Add onion and garlic and saute for 2 minutes. Slowly add spinach, turning and tossing until wilted.