Sort and rinse peas; soak overnight if you like (optional).
Cook bacon in a skillet, then sauté onion, celery, bell pepper, jalapeño, and garlic with spices.
Add peas, ham bone/ham, sausage (if using), sautéed veggies, tomatoes, bay leaves, and broth to slow cooker.
Cook:
No-soak: HIGH 7 hrs or LOW 8–10 hrs
Soaked: HIGH 5–6 hrs or LOW 7–8 hrs
When peas are tender, shred meat from ham bone, mash some peas if you want it creamier, stir in greens for 15–20 minutes.
Season with salt, pepper, and a splash of vinegar or lemon juice. Serve over rice or with cornbread.