Drain the can of black-eyed peas, reserving the liquid; set aside a tablespoon of peas if you want to use them as garnish.
Add the drained black-eyed peas, 1/3 cup tahini, 1 to 2 seeded and diced jalapeños (start with less), 3 tablespoons lemon juice, 2 minced garlic cloves, 1/2 teaspoon salt, cilantro, and 1/2 teaspoon cumin to a food processor or high-powered blender.
Puree until smooth, pausing to scrape down the bowl; add a few tablespoons of the reserved pea liquid as needed to keep the mixture moving and reach your desired consistency.
Taste and adjust seasoning, adding more jalapeño, cilantro, or salt if desired.
Spoon the hummus into a serving bowl, smooth the top, and scatter optional garnishes such as reserved peas, sliced jalapeños, cilantro, and a drizzle of olive oil.
Serve with pita, pita chips, or vegetables for dipping.