Add 2 tbsp olive oil to a saucepan followed by chopped onion and minced garlic. Mix to combine. Next, add 1 & 1/2 tsp of kosher salt, 1 tsp of pepper, and 1/2 tsp of dried oregano. Stir around and let the onion and garlic cook. After this, add the diced carrots, diced red potatoes, 8 cups of chicken stock, and 1/2 cup of dried split peas. Let it simmer for 40 minutes.
Halfway through the cooking, add another half a cup of dried split peas and continue to let the soup simmer.