Dice the red onion into 1/4-inch pieces and set aside. Dice the 2 carrots and 2 celery stalks into small, uniform pieces so they cook evenly and integrate well into the pea mixture. Mince the ginger and garlic cloves, and squeeze the lime juice into a small bowl. Separate the butter lettuce leaves carefully and arrange them on a serving platter, then place the shredded carrots and chopped cilantro in separate bowls for topping.

Heat the coconut oil in a large pot over medium heat until shimmering. Add the diced red onion, carrots, and celery, and sauté for 5 minutes, stirring occasionally, until the vegetables begin to soften and release their aromatics. This builds a flavorful foundation for the peas. Add the minced ginger and garlic, stirring constantly for about 1 minute until fragrant—this prevents the garlic from burning while infusing the oil with deep, warm flavors.

Pour in the tamari, maple syrup, green split peas, and water. Stir to combine and bring the mixture to a boil over high heat. Once boiling, reduce the heat to medium-low and simmer uncovered for 45 to 60 minutes, stirring occasionally. The peas will gradually absorb the liquid and break down into a creamy, chunky consistency—I like to taste them at the 45-minute mark to check for doneness, as cooking time can vary based on pea age and altitude. The mixture is ready when the peas are very soft and most of the liquid has been absorbed.

Remove the pot from heat and stir in the freshly squeezed lime juice and red pepper flakes. The acid from the lime will brighten the rich, savory flavors and cut through the sweetness of the maple syrup. Let the mixture rest for 5 minutes off the heat, which allows the flavors to meld and the peas to fully absorb the seasonings. Taste and adjust seasoning as needed—you can add more lime juice if you want extra brightness, or a touch more tamari for deeper umami.

Spoon a generous portion of the warm pea mixture into each prepared butter lettuce leaf. Top each cup with a small handful of shredded carrots for crunch and a pinch of fresh cilantro for brightness and herbaceous notes. The cool, tender lettuce leaves provide a delicate vessel for the warm, savory peas, while the carrots add textural contrast that makes each bite interesting.