Start by blending peanut butter, tamari, Thai red curry paste, pickled ginger, and sesame oil until smooth. I find a blender gives the creamiest result. Taste and adjust seasoning with a pinch of salt or extra lime juice if needed.
In a bowl, combine steak cubes with sweet Thai chili sauce, tamari, garlic, ginger, and chili paste. I usually let mine sit for at least an hour, but overnight really deepens the flavor. This step makes every bite flavorful and juicy.
Thread the marinated steak onto skewers, optionally alternating with pineapple chunks. Heat the grill and cook skewers until lightly charred on the edges, about 3-4 minutes per side. I like to rotate them for even grill marks.
While the steak cooks, slice avocado and mix with lime juice, cilantro, and basil. Sprinkle toasted sesame seeds on top. This simple garnish brightens the dish and adds color and texture.
Plate the skewers over coconut rice or a simple salad, drizzle generously with peanut sauce, and serve with avocado on the side. I always encourage everyone to double-dip because the sauce is that good.