Over medium high heat, add oil to large pot. Add onions, carrots, celery, ground cumin, salt and pepper and cook for 7-9 minutes, stirring often until vegetables start to soften. Add garlic and leeks and cook for an additional 2 minutes, stirring frequently to avoid burning the vegetables. Add ham bone, ham stock, water, thyme, rosemary, and bay leaves and bring to a simmer. Cover and let simmer for 1 hour.
While ham bone is cooking, preheat oven to 425°F and lightly grease a baking sheet with cooking spray. Wash and dry jalapenos, then cut in half and de-seed. Place on baking sheet with inside of pepper facing up spaced about 1 inch apart. Lightly spray with cooking oil and salt and pepper to taste. Flip over and lightly spray with cooking oil. Bake for 16-19 minutes or until skin start to lightly brown on the edges. Set aside and let cool.
Add peas and continue to simmer covered for 30 minutes. Remove ham bone from pot and add roasted jalapenos (you can roughly chop them if desired). Continue to simmer for an additional 20-30 minutes, until peas are cooked through and soft.
While the soup is finishing up, remove ham meat from the bone and finely chop. Set aside.
Once peas are cooked through, remove from heat. Discard bay leaves and the herb bouquet. Using a hand blender or standard blender, blend soup until smooth. Add ham and mix in well. Salt and pepper to taste and enjoy!
Notes
Ham Stock:When baking a ham, add ½ - 1 inch of water at the bottom. This creates a "ham stock" that will flavor your soup instead of water, vegetable stock, or chicken stock. Simply bake the ham, then let the liquid cool. It will congeal and the fat will rise to the top, making it easy to skim the fat off. Reserve the liquid to add to your soup.If you haven't baked a ham you can replace the stock with chicken or vegetable stock and the ham bone with a ham hock. I would suggest increasing the cook time to 1½ to get the same level of tenderness. Alternatively, you could just add the ham (about 1 lb) at the end but the result will not give you as much depth of flavor as following the initial recipe.Fresh Herbs:I like to prepare my herbs in a bouquet (simply tie together with string) to make it easy to remove the stems at the end of cooking. You can also remove the herbs from the stem and add to the soup at the same time. If you don't have fresh herbs you can substitute dried herbs, about 1 tsp of thyme and 1½ of rosemary.Storage & Reheating:Let soup cool then in a tightly covered container refrigerate up to 3 days. This soup is great for freezing and can be stored for 2-3 months. When reheating, you may need to add little water as this soup thickens when it cools. Simply add until you get the desired consistency and enjoy!