For the Soup:

1. Heat 2 tablespoons oil in a large heavy-bottomed soup pot or Dutch oven over medium-high heat. Add apples, onion, carrots, celery, ginger, thyme, 1 ¼ teaspoon salt and pepper, cover and cook, removing lid to stir often, until the apples have broken down and the vegetables are starting to caramelize slightly along the edges of the pot, 15 to 17 minutes. Add broth, increase heat to high and bring to a boil. Reduce heat to medium-low to maintain a simmer and cook,stirring occasionally, until the vegetables are very soft, 15 to 20 minutes. Puree with an immersion blender. Alternatively, puree in blender in batches. Use caution when blending hot liquids! Stir in vinegar.

Meanwhile, prepare croutons:

1. Preheat oven to 350 degrees F. Stir garlic, 2 tablespoons olive oil, oregano, ½ teaspoon coarse salt, and pepper in a large bowl. Add bread cubes and toss to coat. Spread out on a large baking sheet and bake until crispy, stirring once, 10 to 12 minutes. Serve croutons with soup.