Mix the coconut satay sauce. Start by heating your oven to 400°F (200°C fan). To a baking dish, add the coconut milk, 1 ½ cups chicken stock, 2 tablespoons gochujang paste, 3 tablespoons peanut butter, 2 tablespoons light soy sauce, 2 teaspoons sesame oil, 1 tablespoon honey, the grated ginger, and crushed garlic. Use a whisk to mix them into a smooth, cohesive sauce.
Add the noodles. Place your ramen noodles into the sauce, pressing down so they're mostly submerged. Scatter the diced chicken around the noodles into the sauce, the arrange the spinach leaves on top. Cover tightly with aluminum foil, and pop into the oven for 15 minutes.
Mix the noodles. After 15 minutes, remove the dish from the oven, take the foil off, and use a fork or chopsticks to loosen and mix the noodles through the sauce. Pop the uncovered dish back into the oven for another 10 minutes, until the sauce is bubbling and nicely thickened.
Garnish and serve. Remove the dish from the oven, then drizzle with the chili oil, scatter with the cilantro, sliced scallions, and sesame seeds. Divide the noodles, chicken, and broth between bowls and enjoy while hot.