A few notes: this dish is made with lamb, but I imagine it would be excellent with all sorts of fish or shellfish. For the green beans, I did use tiny, tender haricot vert, but plain old green beans would be fine too. You can blanch and serve the beans, or sauté them for added flavor. I tried both. I also thought about adding a few carrot matchsticks for color and sweetness, but left them out in the end. Finally, I liked the additional flavor of green curry paste in the broth. Note that most curry pastes contain dextrose, so if you’re avoiding sugar or Whole 30-ing, you may want to leave this ingredient out.
Heat a large, deep-sided sauté pan or Dutch oven over medium-high heat. Add coconut oil and shallots. Sauté shallots until translucent and edges have browned. Edge heat down to medium, and add ginger, garlic, fish sauce, red chili paste, and (if using) green curry paste. Sauté 2 minutes more. Deglaze pan with a 1/2 cup of stock; use a wooden spoon to scrape up any brown bits. Stir in remaining stock and coconut milk. Bring mixture to a gentle boil, then turn heat to low and simmer while you make the rest of the dish. Toward the end of cook time, add green onions.
Prepare a hot grill or grill pan. Remove any sliver skin, and trim the leg of lamb into 4 x 4 inch sections (roughly 3/4 - 1 inch thick). Rub each side generously with sea salt and pepper.
For medium-rare lamb, sear each side for 4 - 5 minutes, or until temp reaches 130 degrees F. Rest 3 minutes, then slice into 1/2-inch thick slices.
Meanwhile, blanch haricot vert in salted water for 2 minutes, then dip in ice cold water. Shake haricot vert dry. For added flavor, sauté green beans with 2 tablespoons coconut oil. Add green beans, sea salt to taste, and 2 tablespoons fish sauce. Remove from heat just as beans start to brown.
Add a handful of green beans each to wide4 bowls. Ladle in coconut milk broth and top with several slices of lamb. Top with a generous squeeze of lime, and a small handful each of cilantro and minced green onions.