Rich and hearty split pea soup flavored with salty ham and spices. Perfect with a thick slice of bread.
Place the peas in a large pot or bowl, cover with water by 2 inches and soak 8 hours or overnight.
Once soaking is complete, drain the peas and set aside. In a large pot, heat the butter and oil over medium-high heat. Add the onions, celery, and carrots and cook, stirring, until just soft, about 5 minutes. Add the garlic and ham, and cook, stirring, for another 30 seconds.
Add the drained peas, water, chicken brother, black pepper, bay leaf, and thyme. Cover and bring just to a boil, then lower heat to a simmer. Cook until the peas are tender, about 1 hour, stirring occasionally.
Remove bay leaf. Taste soup and adjust seasonings or adding salt as necessary. Serve warm with thick bread.
I prefer chicken broth for flavor, but vegetable broth would work equally well here.