https://www.simplyrecipes.com/mercimek-corbasi-turkish-lentil-soup-recipe-6824723
Ingredients
3 tablespoons olive oil
1 large yellow onion, finely diced (about 1 1/4 cups)
1 celery rib, finely diced
1 carrot, finely diced
4 cloves garlic, minced or crushed
1 teaspoon ground cumin
1 teaspoon dried oregano
2 tablespoons tatli biber salçasi (Turkish sweet pepper paste)
1 1/2 cups (8.8oz/250g) dried red lentils
2 liters (8 1/2 cups) vegetable stock
1 to 2 lemons, juiced, to taste
1 teaspoon salt, or to taste
1/2 teaspoon freshly ground black pepper, or to taste
For garnish

1/3 cup butter
2 teaspoons olive oil
2 teaspoons pul biber, plus extra to sprinkle on top
6 tablespoons Greek yogurt
6 heaping tablespoons croutons
1/4 bunch fresh parsley, finely chopped