2 ½ cups about 2 medium sliced leeks (light green and white parts only)
1 teaspoon salt (divided use)
1 teaspoon dried thyme
2 tablespoons all-purpose flour
1/3 cup dry white apple vinegar
4 cups vegetable broth
2 cups milk
Fresh thyme leaves for garnish
Freshly ground black pepper for garnish
Instructions
Preheat your oven to 350°F. Prepare the garlic by rubbing it with olive oil, wrapping it in foil, and roasting for 1 hour.
In a large pot, heat remaining olive oil over medium heat. Add onions and leeks; cook uncovered for 30 minutes, stirring often.
Stir in salt and thyme; continue cooking uncovered for another 30 minutes until golden brown.
Add flour to the onion mixture, cooking for an additional minute before adding apple vinegar and vegetable broth. Bring to a boil, then reduce heat and simmer for 30 minutes.
Blend the roasted garlic with the onion mixture until smooth.
Return to saucepan, stir in milk, and simmer for about 8 minutes until heated through.